diff --git a/.eslintrc b/.eslintrc
index b59db4aa1..69ebb7529 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -13,12 +13,13 @@
     "node": true
   },
   "rules": {
+    "arrow-parens": ["error", "as-needed"],
     "class-methods-use-this": ["off"],
     "comma-dangle": ["error", {"arrays": "always-multiline", "objects": "always-multiline", "imports": "always-multiline", "exports": "always-multiline", "functions": "never"}],
     "default-case": ["off"],
     "func-names": ["off", "never"],
     "global-require": ["off"],
-    "max-len": ["error", {"code": 160, "ignoreComments": true, "ignoreStrings": true}],
+    "max-len": ["error", {"code": 100, "ignoreComments": true, "ignoreStrings": true}],
     "no-console": ["error", { "allow": ["warn"] }],
     "no-continue": ["off"],
     "no-mixed-operators": ["error", {"allowSamePrecedence": true}],
diff --git a/.prettier b/.prettier
index 2f891b81a..470c46807 100644
--- a/.prettier
+++ b/.prettier
@@ -1,6 +1,7 @@
 {
   "bracketSpacing": false,
-  "printWidth": 160,
+  "printWidth": 100,
   "trailingComma": "all",
-  "bracketSpacing": false
+  "bracketSpacing": false,
+  "arrowParens": "avoid"
 }
diff --git a/benchmark.js b/benchmark.js
index ca698f02d..9070a0013 100644
--- a/benchmark.js
+++ b/benchmark.js
@@ -8,7 +8,9 @@ const runs = 3;
     await runProfiling('huge xlsx file streams', () => {
       return new Promise((resolve, reject) => {
         // Data taken from http://eforexcel.com/wp/downloads-18-sample-csv-files-data-sets-for-testing-sales/
-        const workbookReader = new ExcelJS.stream.xlsx.WorkbookReader('./spec/integration/data/huge.xlsx');
+        const workbookReader = new ExcelJS.stream.xlsx.WorkbookReader(
+          './spec/integration/data/huge.xlsx'
+        );
         workbookReader.read();
 
         let worksheetCount = 0;
@@ -32,7 +34,9 @@ const runs = 3;
 
     await runProfiling('huge xlsx file async iteration', async () => {
       // Data taken from http://eforexcel.com/wp/downloads-18-sample-csv-files-data-sets-for-testing-sales/
-      const workbookReader = new ExcelJS.stream.xlsx.WorkbookReader('spec/integration/data/huge.xlsx');
+      const workbookReader = new ExcelJS.stream.xlsx.WorkbookReader(
+        'spec/integration/data/huge.xlsx'
+      );
       let worksheetCount = 0;
       let rowCount = 0;
       for await (const worksheetReader of workbookReader) {
@@ -55,13 +59,21 @@ const runs = 3;
 async function runProfiling(name, run) {
   console.log('');
   console.log('####################################################');
-  console.log(`WARMUP: Current memory usage: ${currentMemoryUsage({runGarbageCollector: true})} MB`);
+  console.log(
+    `WARMUP: Current memory usage: ${currentMemoryUsage({runGarbageCollector: true})} MB`
+  );
   console.log(`WARMUP: ${name} profiling started`);
   const warmupStartTime = Date.now();
   await run();
   console.log(`WARMUP: ${name} profiling finished in ${Date.now() - warmupStartTime}ms`);
-  console.log(`WARMUP: Current memory usage (before GC): ${currentMemoryUsage({runGarbageCollector: false})} MB`);
-  console.log(`WARMUP: Current memory usage (after GC): ${currentMemoryUsage({runGarbageCollector: true})} MB`);
+  console.log(
+    `WARMUP: Current memory usage (before GC): ${currentMemoryUsage({
+      runGarbageCollector: false,
+    })} MB`
+  );
+  console.log(
+    `WARMUP: Current memory usage (after GC): ${currentMemoryUsage({runGarbageCollector: true})} MB`
+  );
 
   for (let i = 1; i <= runs; i += 1) {
     console.log('');
@@ -70,8 +82,16 @@ async function runProfiling(name, run) {
     const startTime = Date.now();
     await run(); // eslint-disable-line no-await-in-loop
     console.log(`RUN ${i}: ${name} profiling finished in ${Date.now() - startTime}ms`);
-    console.log(`RUN ${i}: Current memory usage (before GC): ${currentMemoryUsage({runGarbageCollector: false})} MB`);
-    console.log(`RUN ${i}: Current memory usage (after GC): ${currentMemoryUsage({runGarbageCollector: true})} MB`);
+    console.log(
+      `RUN ${i}: Current memory usage (before GC): ${currentMemoryUsage({
+        runGarbageCollector: false,
+      })} MB`
+    );
+    console.log(
+      `RUN ${i}: Current memory usage (after GC): ${currentMemoryUsage({
+        runGarbageCollector: true,
+      })} MB`
+    );
   }
 }
 
diff --git a/excel.js b/excel.js
index 4524877bb..acbb71bb8 100644
--- a/excel.js
+++ b/excel.js
@@ -5,7 +5,9 @@
  */
 
 if (parseInt(process.versions.node.split('.')[0], 10) < 10) {
-  throw new Error('For node versions older than 10, please use the ES5 Import: https://github.com/exceljs/exceljs#es5-imports');
+  throw new Error(
+    'For node versions older than 10, please use the ES5 Import: https://github.com/exceljs/exceljs#es5-imports'
+  );
 }
 
 module.exports = require('./lib/exceljs.nodejs.js');
diff --git a/lib/csv/csv.js b/lib/csv/csv.js
index 79c99daf0..74a51084b 100644
--- a/lib/csv/csv.js
+++ b/lib/csv/csv.js
@@ -2,9 +2,7 @@ const fs = require('fs');
 const fastCsv = require('fast-csv');
 const customParseFormat = require('dayjs/plugin/customParseFormat');
 const utc = require('dayjs/plugin/utc');
-const dayjs = require('dayjs')
-  .extend(customParseFormat)
-  .extend(utc);
+const dayjs = require('dayjs').extend(customParseFormat).extend(utc);
 const StreamBuf = require('../utils/stream-buf');
 
 const {
@@ -48,7 +46,12 @@ class CSV {
     return new Promise((resolve, reject) => {
       const worksheet = this.workbook.addWorksheet(options.sheetName);
 
-      const dateFormats = options.dateFormats || ['YYYY-MM-DD[T]HH:mm:ssZ', 'YYYY-MM-DD[T]HH:mm:ss', 'MM-DD-YYYY', 'YYYY-MM-DD'];
+      const dateFormats = options.dateFormats || [
+        'YYYY-MM-DD[T]HH:mm:ssZ',
+        'YYYY-MM-DD[T]HH:mm:ss',
+        'MM-DD-YYYY',
+        'YYYY-MM-DD',
+      ];
       const map =
         options.map ||
         function(datum) {
@@ -132,7 +135,9 @@ class CSV {
             }
             if (value instanceof Date) {
               if (dateFormat) {
-                return dateUTC ? dayjs.utc(value).format(dateFormat) : dayjs(value).format(dateFormat);
+                return dateUTC
+                  ? dayjs.utc(value).format(dateFormat)
+                  : dayjs(value).format(dateFormat);
               }
               return dateUTC ? dayjs.utc(value).format() : dayjs(value).format();
             }
diff --git a/lib/csv/stream-converter.js b/lib/csv/stream-converter.js
index 639aa5b7d..f7706b25a 100644
--- a/lib/csv/stream-converter.js
+++ b/lib/csv/stream-converter.js
@@ -80,7 +80,11 @@ class StreamConverter {
       this.writeStarted = true;
     }
 
-    this.inner.write(this.convertInwards(data), encoding ? this.innerEncoding : undefined, callback);
+    this.inner.write(
+      this.convertInwards(data),
+      encoding ? this.innerEncoding : undefined,
+      callback
+    );
   }
 
   read() {
diff --git a/lib/doc/anchor.js b/lib/doc/anchor.js
index c98bef374..a1f6cda98 100644
--- a/lib/doc/anchor.js
+++ b/lib/doc/anchor.js
@@ -56,13 +56,17 @@ class Anchor {
   }
 
   get colWidth() {
-    return this.worksheet && this.worksheet.getColumn(this.nativeCol + 1) && this.worksheet.getColumn(this.nativeCol + 1).isCustomWidth
+    return this.worksheet &&
+      this.worksheet.getColumn(this.nativeCol + 1) &&
+      this.worksheet.getColumn(this.nativeCol + 1).isCustomWidth
       ? Math.floor(this.worksheet.getColumn(this.nativeCol + 1).width * 10000)
       : 640000;
   }
 
   get rowHeight() {
-    return this.worksheet && this.worksheet.getRow(this.nativeRow + 1) && this.worksheet.getRow(this.nativeRow + 1).height
+    return this.worksheet &&
+      this.worksheet.getRow(this.nativeRow + 1) &&
+      this.worksheet.getRow(this.nativeRow + 1).height
       ? Math.floor(this.worksheet.getRow(this.nativeRow + 1).height * 10000)
       : 180000;
   }
diff --git a/lib/doc/cell.js b/lib/doc/cell.js
index 3ae2457a8..251dded27 100644
--- a/lib/doc/cell.js
+++ b/lib/doc/cell.js
@@ -787,7 +787,9 @@ class FormulaValue {
   get dependencies() {
     // find all the ranges and cells mentioned in the formula
     const ranges = this.formula.match(/([a-zA-Z0-9]+!)?[A-Z]{1,3}\d{1,4}:[A-Z]{1,3}\d{1,4}/g);
-    const cells = this.formula.replace(/([a-zA-Z0-9]+!)?[A-Z]{1,3}\d{1,4}:[A-Z]{1,3}\d{1,4}/g, '').match(/([a-zA-Z0-9]+!)?[A-Z]{1,3}\d{1,4}/g);
+    const cells = this.formula
+      .replace(/([a-zA-Z0-9]+!)?[A-Z]{1,3}\d{1,4}:[A-Z]{1,3}\d{1,4}/g, '')
+      .match(/([a-zA-Z0-9]+!)?[A-Z]{1,3}\d{1,4}/g);
     return {
       ranges,
       cells,
@@ -860,7 +862,8 @@ class FormulaValue {
     if (!this._translatedFormula && this.model.sharedFormula) {
       const {worksheet} = this.cell;
       const master = worksheet.findCell(this.model.sharedFormula);
-      this._translatedFormula = master && slideFormula(master.formula, master.address, this.model.address);
+      this._translatedFormula =
+        master && slideFormula(master.formula, master.address, this.model.address);
     }
     return this._translatedFormula;
   }
diff --git a/lib/doc/column.js b/lib/doc/column.js
index e5f8ceef0..f7636172c 100644
--- a/lib/doc/column.js
+++ b/lib/doc/column.js
@@ -122,7 +122,9 @@ class Column {
   }
 
   get collapsed() {
-    return !!(this._outlineLevel && this._outlineLevel >= this._worksheet.properties.outlineLevelCol);
+    return !!(
+      this._outlineLevel && this._outlineLevel >= this._worksheet.properties.outlineLevelCol
+    );
   }
 
   toString() {
@@ -134,7 +136,12 @@ class Column {
   }
 
   equivalentTo(other) {
-    return this.width === other.width && this.hidden === other.hidden && this.outlineLevel === other.outlineLevel && _.isEqual(this.style, other.style);
+    return (
+      this.width === other.width &&
+      this.hidden === other.hidden &&
+      this.outlineLevel === other.outlineLevel &&
+      _.isEqual(this.style, other.style)
+    );
   }
 
   get isDefault() {
diff --git a/lib/doc/defined-names.js b/lib/doc/defined-names.js
index 597744207..cb3a4942f 100644
--- a/lib/doc/defined-names.js
+++ b/lib/doc/defined-names.js
@@ -73,7 +73,9 @@ class DefinedNames {
   }
 
   getNamesEx(address) {
-    return _.map(this.matrixMap, (matrix, name) => matrix.findCellEx(address) && name).filter(Boolean);
+    return _.map(this.matrixMap, (matrix, name) => matrix.findCellEx(address) && name).filter(
+      Boolean
+    );
   }
 
   _explore(matrix, cell) {
@@ -172,7 +174,9 @@ class DefinedNames {
 
   get model() {
     // To get names per cell - just iterate over all names finding cells if they exist
-    return _.map(this.matrixMap, (matrix, name) => this.getRanges(name, matrix)).filter(definedName => definedName.ranges.length);
+    return _.map(this.matrixMap, (matrix, name) => this.getRanges(name, matrix)).filter(
+      definedName => definedName.ranges.length
+    );
   }
 
   set model(value) {
diff --git a/lib/doc/modelcontainer.js b/lib/doc/modelcontainer.js
index b60e1a3d2..ef0fb9249 100644
--- a/lib/doc/modelcontainer.js
+++ b/lib/doc/modelcontainer.js
@@ -1,6 +1,6 @@
 'use strict';
 
-const XLSX = require('./../xlsx/xlsx');
+const XLSX = require('../xlsx/xlsx');
 
 class ModelContainer {
   constructor(model) {
diff --git a/lib/doc/range.js b/lib/doc/range.js
index acba915b4..096ebf1ed 100644
--- a/lib/doc/range.js
+++ b/lib/doc/range.js
@@ -1,4 +1,4 @@
-const colCache = require('./../utils/col-cache');
+const colCache = require('../utils/col-cache');
 
 // used by worksheet to calculate sheet dimensions
 class Range {
@@ -237,7 +237,12 @@ class Range {
 
   containsEx(address) {
     if (address.sheetName && this.sheetName && address.sheetName !== this.sheetName) return false;
-    return address.row >= this.top && address.row <= this.bottom && address.col >= this.left && address.col <= this.right;
+    return (
+      address.row >= this.top &&
+      address.row <= this.bottom &&
+      address.col >= this.left &&
+      address.col <= this.right
+    );
   }
 
   forEachAddress(cb) {
diff --git a/lib/doc/row.js b/lib/doc/row.js
index 520cc7fe9..054f52a6a 100644
--- a/lib/doc/row.js
+++ b/lib/doc/row.js
@@ -324,7 +324,9 @@ class Row {
   }
 
   get collapsed() {
-    return !!(this._outlineLevel && this._outlineLevel >= this._worksheet.properties.outlineLevelRow);
+    return !!(
+      this._outlineLevel && this._outlineLevel >= this._worksheet.properties.outlineLevelRow
+    );
   }
 
   // =========================================================================
diff --git a/lib/doc/table.js b/lib/doc/table.js
index 112b2e80b..87a96d29c 100644
--- a/lib/doc/table.js
+++ b/lib/doc/table.js
@@ -1,5 +1,5 @@
 /* eslint-disable max-classes-per-file */
-const colCache = require('./../utils/col-cache');
+const colCache = require('../utils/col-cache');
 
 class Column {
   // wrapper around column model, allowing access and manipulation
diff --git a/lib/doc/workbook.js b/lib/doc/workbook.js
index 98c42c0ea..0044a7fad 100644
--- a/lib/doc/workbook.js
+++ b/lib/doc/workbook.js
@@ -59,7 +59,9 @@ class Workbook {
     if (options) {
       if (typeof options === 'string') {
         // eslint-disable-next-line no-console
-        console.trace('tabColor argument is now deprecated. Please use workbook.addWorksheet(name, {properties: { tabColor: { argb: "rbg value" } }');
+        console.trace(
+          'tabColor argument is now deprecated. Please use workbook.addWorksheet(name, {properties: { tabColor: { argb: "rbg value" } }'
+        );
         options = {
           properties: {
             tabColor: {argb: options},
@@ -67,7 +69,9 @@ class Workbook {
         };
       } else if (options.argb || options.theme || options.indexed) {
         // eslint-disable-next-line no-console
-        console.trace('tabColor argument is now deprecated. Please use workbook.addWorksheet(name, {properties: { tabColor: { ... } }');
+        console.trace(
+          'tabColor argument is now deprecated. Please use workbook.addWorksheet(name, {properties: { tabColor: { ... } }'
+        );
         options = {
           properties: {
             tabColor: options,
@@ -76,7 +80,10 @@ class Workbook {
       }
     }
 
-    const lastOrderNo = this._worksheets.reduce((acc, ws) => ((ws && ws.orderNo) > acc ? ws.orderNo : acc), 0);
+    const lastOrderNo = this._worksheets.reduce(
+      (acc, ws) => ((ws && ws.orderNo) > acc ? ws.orderNo : acc),
+      0
+    );
     const worksheetOptions = Object.assign({}, options, {
       id,
       name,
diff --git a/lib/doc/worksheet.js b/lib/doc/worksheet.js
index b1ca37852..3bcfb377b 100644
--- a/lib/doc/worksheet.js
+++ b/lib/doc/worksheet.js
@@ -68,7 +68,11 @@ class Worksheet {
         orientation: 'portrait',
         horizontalDpi: 4294967295,
         verticalDpi: 4294967295,
-        fitToPage: !!(options.pageSetup && (options.pageSetup.fitToWidth || options.pageSetup.fitToHeight) && !options.pageSetup.scale),
+        fitToPage: !!(
+          options.pageSetup &&
+          (options.pageSetup.fitToWidth || options.pageSetup.fitToHeight) &&
+          !options.pageSetup.scale
+        ),
         pageOrder: 'downThenOver',
         blackAndWhite: false,
         draft: false,
@@ -693,13 +697,21 @@ class Worksheet {
       };
       if (options && 'spinCount' in options) {
         // force spinCount to be integer >= 0
-        options.spinCount = Number.isFinite(options.spinCount) ? Math.round(Math.max(0, options.spinCount)) : 100000;
+        options.spinCount = Number.isFinite(options.spinCount)
+          ? Math.round(Math.max(0, options.spinCount))
+          : 100000;
       }
       if (password) {
         this.sheetProtection.algorithmName = 'SHA-512';
         this.sheetProtection.saltValue = Encryptor.randomBytes(16).toString('base64');
-        this.sheetProtection.spinCount = options && 'spinCount' in options ? options.spinCount : 100000; // allow user specified spinCount
-        this.sheetProtection.hashValue = Encryptor.convertPasswordToHash(password, 'SHA512', this.sheetProtection.saltValue, this.sheetProtection.spinCount);
+        this.sheetProtection.spinCount =
+          options && 'spinCount' in options ? options.spinCount : 100000; // allow user specified spinCount
+        this.sheetProtection.hashValue = Encryptor.convertPasswordToHash(
+          password,
+          'SHA512',
+          this.sheetProtection.saltValue,
+          this.sheetProtection.spinCount
+        );
       }
       if (options) {
         this.sheetProtection = Object.assign(this.sheetProtection, options);
@@ -755,13 +767,17 @@ class Worksheet {
   // Deprecated
   get tabColor() {
     // eslint-disable-next-line no-console
-    console.trace('worksheet.tabColor property is now deprecated. Please use worksheet.properties.tabColor');
+    console.trace(
+      'worksheet.tabColor property is now deprecated. Please use worksheet.properties.tabColor'
+    );
     return this.properties.tabColor;
   }
 
   set tabColor(value) {
     // eslint-disable-next-line no-console
-    console.trace('worksheet.tabColor property is now deprecated. Please use worksheet.properties.tabColor');
+    console.trace(
+      'worksheet.tabColor property is now deprecated. Please use worksheet.properties.tabColor'
+    );
     this.properties.tabColor = value;
   }
 
diff --git a/lib/stream/xlsx/sheet-rels-writer.js b/lib/stream/xlsx/sheet-rels-writer.js
index 28fb8b92a..6ef9beaba 100644
--- a/lib/stream/xlsx/sheet-rels-writer.js
+++ b/lib/stream/xlsx/sheet-rels-writer.js
@@ -103,7 +103,9 @@ class SheetRelsWriter {
           '/>'
       );
     } else {
-      this.stream.write(`<Relationship Id="${rId}" Type="${relationship.Type}" Target="${relationship.Target}"/>`);
+      this.stream.write(
+        `<Relationship Id="${rId}" Type="${relationship.Type}" Target="${relationship.Target}"/>`
+      );
     }
 
     return rId;
diff --git a/lib/stream/xlsx/workbook-reader.js b/lib/stream/xlsx/workbook-reader.js
index cbaa81e59..8e686319f 100644
--- a/lib/stream/xlsx/workbook-reader.js
+++ b/lib/stream/xlsx/workbook-reader.js
@@ -280,7 +280,12 @@ class WorkbookReader extends EventEmitter {
 
   *_parseWorksheet(iterator, sheetNo) {
     this._emitEntry({type: 'worksheet', id: sheetNo});
-    const worksheetReader = new WorksheetReader({workbook: this, id: sheetNo, iterator, options: this.options});
+    const worksheetReader = new WorksheetReader({
+      workbook: this,
+      id: sheetNo,
+      iterator,
+      options: this.options,
+    });
     if (this.options.worksheets === 'emit') {
       yield {eventType: 'worksheet', value: worksheetReader};
     }
@@ -288,7 +293,12 @@ class WorkbookReader extends EventEmitter {
 
   *_parseHyperlinks(iterator, sheetNo) {
     this._emitEntry({type: 'hyperlinks', id: sheetNo});
-    const hyperlinksReader = new HyperlinkReader({workbook: this, id: sheetNo, iterator, options: this.options});
+    const hyperlinksReader = new HyperlinkReader({
+      workbook: this,
+      id: sheetNo,
+      iterator,
+      options: this.options,
+    });
     if (this.options.hyperlinks === 'emit') {
       yield {eventType: 'hyperlinks', value: hyperlinksReader};
     }
diff --git a/lib/stream/xlsx/workbook-writer.js b/lib/stream/xlsx/workbook-writer.js
index 6816c58d6..2d97cec88 100644
--- a/lib/stream/xlsx/workbook-writer.js
+++ b/lib/stream/xlsx/workbook-writer.js
@@ -99,7 +99,14 @@ class WorkbookWriter {
     await this.promise;
     await this.addMedia();
     await this._commitWorksheets();
-    await Promise.all([this.addContentTypes(), this.addApp(), this.addCore(), this.addSharedStrings(), this.addStyles(), this.addWorkbookRels()]);
+    await Promise.all([
+      this.addContentTypes(),
+      this.addApp(),
+      this.addCore(),
+      this.addSharedStrings(),
+      this.addStyles(),
+      this.addWorkbookRels(),
+    ]);
     await this.addWorkbook();
     return this._finalize();
   }
@@ -131,7 +138,8 @@ class WorkbookWriter {
     // shared string handling
     // in fact, it's even possible to switch it mid-sheet
     options = options || {};
-    const useSharedStrings = options.useSharedStrings !== undefined ? options.useSharedStrings : this.useSharedStrings;
+    const useSharedStrings =
+      options.useSharedStrings !== undefined ? options.useSharedStrings : this.useSharedStrings;
 
     if (options.tabColor) {
       // eslint-disable-next-line no-console
@@ -281,12 +289,20 @@ class WorkbookWriter {
       {Id: `rId${count++}`, Type: RelType.Theme, Target: 'theme/theme1.xml'},
     ];
     if (this.sharedStrings.count) {
-      relationships.push({Id: `rId${count++}`, Type: RelType.SharedStrings, Target: 'sharedStrings.xml'});
+      relationships.push({
+        Id: `rId${count++}`,
+        Type: RelType.SharedStrings,
+        Target: 'sharedStrings.xml',
+      });
     }
     this._worksheets.forEach(worksheet => {
       if (worksheet) {
         worksheet.rId = `rId${count++}`;
-        relationships.push({Id: worksheet.rId, Type: RelType.Worksheet, Target: `worksheets/sheet${worksheet.id}.xml`});
+        relationships.push({
+          Id: worksheet.rId,
+          Type: RelType.Worksheet,
+          Target: `worksheets/sheet${worksheet.id}.xml`,
+        });
       }
     });
     return new Promise(resolve => {
diff --git a/lib/stream/xlsx/worksheet-reader.js b/lib/stream/xlsx/worksheet-reader.js
index 8ad59d3d3..ade13f426 100644
--- a/lib/stream/xlsx/worksheet-reader.js
+++ b/lib/stream/xlsx/worksheet-reader.js
@@ -321,7 +321,10 @@ class WorksheetReader extends EventEmitter {
 
                       default:
                         if (utils.isDateFmt(cell.numFmt)) {
-                          cell.value = utils.excelToDate(parseFloat(c.v.text), properties.model && properties.model.date1904);
+                          cell.value = utils.excelToDate(
+                            parseFloat(c.v.text),
+                            properties.model && properties.model.date1904
+                          );
                         } else {
                           cell.value = parseFloat(c.v.text);
                         }
diff --git a/lib/stream/xlsx/worksheet-writer.js b/lib/stream/xlsx/worksheet-writer.js
index 47a199c62..480b59fe8 100644
--- a/lib/stream/xlsx/worksheet-writer.js
+++ b/lib/stream/xlsx/worksheet-writer.js
@@ -142,7 +142,11 @@ class WorksheetWriter {
         orientation: 'portrait',
         horizontalDpi: 4294967295,
         verticalDpi: 4294967295,
-        fitToPage: !!(options.pageSetup && (options.pageSetup.fitToWidth || options.pageSetup.fitToHeight) && !options.pageSetup.scale),
+        fitToPage: !!(
+          options.pageSetup &&
+          (options.pageSetup.fitToWidth || options.pageSetup.fitToHeight) &&
+          !options.pageSetup.scale
+        ),
         pageOrder: 'downThenOver',
         blackAndWhite: false,
         draft: false,
diff --git a/lib/utils/cell-matrix.js b/lib/utils/cell-matrix.js
index 121b5141d..7c0956b76 100644
--- a/lib/utils/cell-matrix.js
+++ b/lib/utils/cell-matrix.js
@@ -130,7 +130,9 @@ class CellMatrix {
       return row[col];
     }
     if (create) {
-      return (row[col] = this.template ? Object.assign(address, JSON.parse(JSON.stringify(this.template))) : address);
+      return (row[col] = this.template
+        ? Object.assign(address, JSON.parse(JSON.stringify(this.template)))
+        : address);
     }
     return undefined;
   }
diff --git a/lib/utils/col-cache.js b/lib/utils/col-cache.js
index 00b83e693..e6bacc187 100644
--- a/lib/utils/col-cache.js
+++ b/lib/utils/col-cache.js
@@ -1,7 +1,34 @@
 // =========================================================================
 // Column Letter to Number conversion
 const colCache = {
-  _dictionary: ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'],
+  _dictionary: [
+    'A',
+    'B',
+    'C',
+    'D',
+    'E',
+    'F',
+    'G',
+    'H',
+    'I',
+    'J',
+    'K',
+    'L',
+    'M',
+    'N',
+    'O',
+    'P',
+    'Q',
+    'R',
+    'S',
+    'T',
+    'U',
+    'V',
+    'W',
+    'X',
+    'Y',
+    'Z',
+  ],
   _l2n: {},
   _n2l: [],
   _level(n) {
@@ -179,7 +206,13 @@ const colCache = {
         right,
         sheetName,
         tl: {address: tl, col: left, row: top, $col$row: `$${this.n2l(left)}$${top}`, sheetName},
-        br: {address: br, col: right, row: bottom, $col$row: `$${this.n2l(right)}$${bottom}`, sheetName},
+        br: {
+          address: br,
+          col: right,
+          row: bottom,
+          $col$row: `$${this.n2l(right)}$${bottom}`,
+          sheetName,
+        },
         dimensions: `${tl}:${br}`,
       };
     }
@@ -202,7 +235,10 @@ const colCache = {
       case 2:
         return colCache.encodeAddress(arguments[0], arguments[1]);
       case 4:
-        return `${colCache.encodeAddress(arguments[0], arguments[1])}:${colCache.encodeAddress(arguments[2], arguments[3])}`;
+        return `${colCache.encodeAddress(arguments[0], arguments[1])}:${colCache.encodeAddress(
+          arguments[2],
+          arguments[3]
+        )}`;
       default:
         throw new Error('Can only encode with 2 or 4 arguments');
     }
diff --git a/lib/utils/parse-sax.js b/lib/utils/parse-sax.js
index b9c830917..d3a53a497 100644
--- a/lib/utils/parse-sax.js
+++ b/lib/utils/parse-sax.js
@@ -1,7 +1,7 @@
 const {SaxesParser} = require('saxes');
 const {PassThrough} = require('readable-stream');
 
-module.exports = async function*(iterable) {
+module.exports = async function* (iterable) {
   // TODO: Remove once node v8 is deprecated
   // Detect and upgrade old streams
   if (iterable.pipe && !iterable[Symbol.asyncIterator]) {
diff --git a/lib/utils/shared-formula.js b/lib/utils/shared-formula.js
index ad8d70d28..0c9f241fb 100644
--- a/lib/utils/shared-formula.js
+++ b/lib/utils/shared-formula.js
@@ -7,33 +7,36 @@ const CRrx = /^([$])?([a-z]+)([$])?([1-9][0-9]*)$/i;
 function slideFormula(formula, fromCell, toCell) {
   const offset = colCache.decode(fromCell);
   const to = colCache.decode(toCell);
-  return formula.replace(replacementCandidateRx, (refMatch, sheet, sheetMaybe, addrPart, trailingParen) => {
-    if (trailingParen) {
-      return refMatch;
-    }
-    const match = CRrx.exec(addrPart);
-    if (match) {
-      const colDollar = match[1];
-      const colStr = match[2].toUpperCase();
-      const rowDollar = match[3];
-      const rowStr = match[4];
-      if (colStr.length > 3 || (colStr.length === 3 && colStr > 'XFD')) {
-        // > XFD is the highest col number in excel 2007 and beyond, so this is a named range
+  return formula.replace(
+    replacementCandidateRx,
+    (refMatch, sheet, sheetMaybe, addrPart, trailingParen) => {
+      if (trailingParen) {
         return refMatch;
       }
-      let col = colCache.l2n(colStr);
-      let row = parseInt(rowStr, 10);
-      if (!colDollar) {
-        col += to.col - offset.col;
+      const match = CRrx.exec(addrPart);
+      if (match) {
+        const colDollar = match[1];
+        const colStr = match[2].toUpperCase();
+        const rowDollar = match[3];
+        const rowStr = match[4];
+        if (colStr.length > 3 || (colStr.length === 3 && colStr > 'XFD')) {
+          // > XFD is the highest col number in excel 2007 and beyond, so this is a named range
+          return refMatch;
+        }
+        let col = colCache.l2n(colStr);
+        let row = parseInt(rowStr, 10);
+        if (!colDollar) {
+          col += to.col - offset.col;
+        }
+        if (!rowDollar) {
+          row += to.row - offset.row;
+        }
+        const res = (sheet || '') + (colDollar || '') + colCache.n2l(col) + (rowDollar || '') + row;
+        return res;
       }
-      if (!rowDollar) {
-        row += to.row - offset.row;
-      }
-      const res = (sheet || '') + (colDollar || '') + colCache.n2l(col) + (rowDollar || '') + row;
-      return res;
+      return refMatch;
     }
-    return refMatch;
-  });
+  );
 }
 
 module.exports = {
diff --git a/lib/utils/utils.js b/lib/utils/utils.js
index f13669a87..9f79d632e 100644
--- a/lib/utils/utils.js
+++ b/lib/utils/utils.js
@@ -54,7 +54,9 @@ const utils = {
     return 25569 + d.getTime() / (24 * 3600 * 1000) - (date1904 ? 1462 : 0);
   },
   excelToDate(v, date1904) {
-    const millisecondSinceEpoch = Math.round((v - 25569 + (date1904 ? 1462 : 0)) * 24 * 3600 * 1000);
+    const millisecondSinceEpoch = Math.round(
+      (v - 25569 + (date1904 ? 1462 : 0)) * 24 * 3600 * 1000
+    );
     return new Date(millisecondSinceEpoch);
   },
   parsePath(filepath) {
diff --git a/lib/xlsx/defaultnumformats.js b/lib/xlsx/defaultnumformats.js
index 5839409f8..b0b7d08f0 100644
--- a/lib/xlsx/defaultnumformats.js
+++ b/lib/xlsx/defaultnumformats.js
@@ -19,16 +19,61 @@ module.exports = {
   21: {f: 'h:mm:ss'},
   22: {f: 'm/d/yy "h":mm'},
 
-  27: {'zh-tw': '[$-404]e/m/d', 'zh-cn': 'yyyy"年"m"月"', 'ja-jp': '[$-411]ge.m.d', 'ko-kr': 'yyyy"年" mm"月" dd"日"'},
-  28: {'zh-tw': '[$-404]e"年"m"月"d"日"', 'zh-cn': 'm"月"d"日"', 'ja-jp': '[$-411]ggge"年"m"月"d"日"', 'ko-kr': 'mm-dd'},
-  29: {'zh-tw': '[$-404]e"年"m"月"d"日"', 'zh-cn': 'm"月"d"日"', 'ja-jp': '[$-411]ggge"年"m"月"d"日"', 'ko-kr': 'mm-dd'},
+  27: {
+    'zh-tw': '[$-404]e/m/d',
+    'zh-cn': 'yyyy"年"m"月"',
+    'ja-jp': '[$-411]ge.m.d',
+    'ko-kr': 'yyyy"年" mm"月" dd"日"',
+  },
+  28: {
+    'zh-tw': '[$-404]e"年"m"月"d"日"',
+    'zh-cn': 'm"月"d"日"',
+    'ja-jp': '[$-411]ggge"年"m"月"d"日"',
+    'ko-kr': 'mm-dd',
+  },
+  29: {
+    'zh-tw': '[$-404]e"年"m"月"d"日"',
+    'zh-cn': 'm"月"d"日"',
+    'ja-jp': '[$-411]ggge"年"m"月"d"日"',
+    'ko-kr': 'mm-dd',
+  },
   30: {'zh-tw': 'm/d/yy ', 'zh-cn': 'm-d-yy', 'ja-jp': 'm/d/yy', 'ko-kr': 'mm-dd-yy'},
-  31: {'zh-tw': 'yyyy"年"m"月"d"日"', 'zh-cn': 'yyyy"年"m"月"d"日"', 'ja-jp': 'yyyy"年"m"月"d"日"', 'ko-kr': 'yyyy"년" mm"월" dd"일"'},
-  32: {'zh-tw': 'hh"時"mm"分"', 'zh-cn': 'h"时"mm"分"', 'ja-jp': 'h"時"mm"分"', 'ko-kr': 'h"시" mm"분"'},
-  33: {'zh-tw': 'hh"時"mm"分"ss"秒"', 'zh-cn': 'h"时"mm"分"ss"秒"', 'ja-jp': 'h"時"mm"分"ss"秒"', 'ko-kr': 'h"시" mm"분" ss"초"'},
-  34: {'zh-tw': '上午/下午 hh"時"mm"分"', 'zh-cn': '上午/下午 h"时"mm"分"', 'ja-jp': 'yyyy"年"m"月"', 'ko-kr': 'yyyy-mm-dd'},
-  35: {'zh-tw': '上午/下午 hh"時"mm"分"ss"秒"', 'zh-cn': '上午/下午 h"时"mm"分"ss"秒"', 'ja-jp': 'm"月"d"日"', 'ko-kr': 'yyyy-mm-dd'},
-  36: {'zh-tw': '[$-404]e/m/d', 'zh-cn': 'yyyy"年"m"月"', 'ja-jp': '[$-411]ge.m.d', 'ko-kr': 'yyyy"年" mm"月" dd"日"'},
+  31: {
+    'zh-tw': 'yyyy"年"m"月"d"日"',
+    'zh-cn': 'yyyy"年"m"月"d"日"',
+    'ja-jp': 'yyyy"年"m"月"d"日"',
+    'ko-kr': 'yyyy"년" mm"월" dd"일"',
+  },
+  32: {
+    'zh-tw': 'hh"時"mm"分"',
+    'zh-cn': 'h"时"mm"分"',
+    'ja-jp': 'h"時"mm"分"',
+    'ko-kr': 'h"시" mm"분"',
+  },
+  33: {
+    'zh-tw': 'hh"時"mm"分"ss"秒"',
+    'zh-cn': 'h"时"mm"分"ss"秒"',
+    'ja-jp': 'h"時"mm"分"ss"秒"',
+    'ko-kr': 'h"시" mm"분" ss"초"',
+  },
+  34: {
+    'zh-tw': '上午/下午 hh"時"mm"分"',
+    'zh-cn': '上午/下午 h"时"mm"分"',
+    'ja-jp': 'yyyy"年"m"月"',
+    'ko-kr': 'yyyy-mm-dd',
+  },
+  35: {
+    'zh-tw': '上午/下午 hh"時"mm"分"ss"秒"',
+    'zh-cn': '上午/下午 h"时"mm"分"ss"秒"',
+    'ja-jp': 'm"月"d"日"',
+    'ko-kr': 'yyyy-mm-dd',
+  },
+  36: {
+    'zh-tw': '[$-404]e/m/d',
+    'zh-cn': 'yyyy"年"m"月"',
+    'ja-jp': '[$-411]ge.m.d',
+    'ko-kr': 'yyyy"年" mm"月" dd"日"',
+  },
 
   37: {f: '#,##0 ;(#,##0)'},
   38: {f: '#,##0 ;[Red](#,##0)'},
@@ -40,15 +85,60 @@ module.exports = {
   48: {f: '##0.0E+0'},
   49: {f: '@'},
 
-  50: {'zh-tw': '[$-404]e/m/d', 'zh-cn': 'yyyy"年"m"月"', 'ja-jp': '[$-411]ge.m.d', 'ko-kr': 'yyyy"年" mm"月" dd"日"'},
-  51: {'zh-tw': '[$-404]e"年"m"月"d"日"', 'zh-cn': 'm"月"d"日"', 'ja-jp': '[$-411]ggge"年"m"月"d"日"', 'ko-kr': 'mm-dd'},
-  52: {'zh-tw': '上午/下午 hh"時"mm"分"', 'zh-cn': 'yyyy"年"m"月"', 'ja-jp': 'yyyy"年"m"月"', 'ko-kr': 'yyyy-mm-dd'},
-  53: {'zh-tw': '上午/下午 hh"時"mm"分"ss"秒"', 'zh-cn': 'm"月"d"日"', 'ja-jp': 'm"月"d"日"', 'ko-kr': 'yyyy-mm-dd'},
-  54: {'zh-tw': '[$-404]e"年"m"月"d"日"', 'zh-cn': 'm"月"d"日"', 'ja-jp': '[$-411]ggge"年"m"月"d"日"', 'ko-kr': 'mm-dd'},
-  55: {'zh-tw': '上午/下午 hh"時"mm"分"', 'zh-cn': '上午/下午 h"时"mm"分"', 'ja-jp': 'yyyy"年"m"月"', 'ko-kr': 'yyyy-mm-dd'},
-  56: {'zh-tw': '上午/下午 hh"時"mm"分"ss"秒"', 'zh-cn': '上午/下午 h"时"mm"分"ss"秒"', 'ja-jp': 'm"月"d"日"', 'ko-kr': 'yyyy-mm-dd'},
-  57: {'zh-tw': '[$-404]e/m/d', 'zh-cn': 'yyyy"年"m"月"', 'ja-jp': '[$-411]ge.m.d', 'ko-kr': 'yyyy"年" mm"月" dd"日"'},
-  58: {'zh-tw': '[$-404]e"年"m"月"d"日"', 'zh-cn': 'm"月"d"日"', 'ja-jp': '[$-411]ggge"年"m"月"d"日"', 'ko-kr': 'mm-dd'},
+  50: {
+    'zh-tw': '[$-404]e/m/d',
+    'zh-cn': 'yyyy"年"m"月"',
+    'ja-jp': '[$-411]ge.m.d',
+    'ko-kr': 'yyyy"年" mm"月" dd"日"',
+  },
+  51: {
+    'zh-tw': '[$-404]e"年"m"月"d"日"',
+    'zh-cn': 'm"月"d"日"',
+    'ja-jp': '[$-411]ggge"年"m"月"d"日"',
+    'ko-kr': 'mm-dd',
+  },
+  52: {
+    'zh-tw': '上午/下午 hh"時"mm"分"',
+    'zh-cn': 'yyyy"年"m"月"',
+    'ja-jp': 'yyyy"年"m"月"',
+    'ko-kr': 'yyyy-mm-dd',
+  },
+  53: {
+    'zh-tw': '上午/下午 hh"時"mm"分"ss"秒"',
+    'zh-cn': 'm"月"d"日"',
+    'ja-jp': 'm"月"d"日"',
+    'ko-kr': 'yyyy-mm-dd',
+  },
+  54: {
+    'zh-tw': '[$-404]e"年"m"月"d"日"',
+    'zh-cn': 'm"月"d"日"',
+    'ja-jp': '[$-411]ggge"年"m"月"d"日"',
+    'ko-kr': 'mm-dd',
+  },
+  55: {
+    'zh-tw': '上午/下午 hh"時"mm"分"',
+    'zh-cn': '上午/下午 h"时"mm"分"',
+    'ja-jp': 'yyyy"年"m"月"',
+    'ko-kr': 'yyyy-mm-dd',
+  },
+  56: {
+    'zh-tw': '上午/下午 hh"時"mm"分"ss"秒"',
+    'zh-cn': '上午/下午 h"时"mm"分"ss"秒"',
+    'ja-jp': 'm"月"d"日"',
+    'ko-kr': 'yyyy-mm-dd',
+  },
+  57: {
+    'zh-tw': '[$-404]e/m/d',
+    'zh-cn': 'yyyy"年"m"月"',
+    'ja-jp': '[$-411]ge.m.d',
+    'ko-kr': 'yyyy"年" mm"月" dd"日"',
+  },
+  58: {
+    'zh-tw': '[$-404]e"年"m"月"d"日"',
+    'zh-cn': 'm"月"d"日"',
+    'ja-jp': '[$-411]ggge"年"m"月"d"日"',
+    'ko-kr': 'mm-dd',
+  },
 
   59: {'th-th': 't0'},
   60: {'th-th': 't0.00'},
diff --git a/lib/xlsx/rel-type.js b/lib/xlsx/rel-type.js
index 611cd3a98..7cd0a3d05 100644
--- a/lib/xlsx/rel-type.js
+++ b/lib/xlsx/rel-type.js
@@ -1,16 +1,20 @@
 'use strict';
 
 module.exports = {
-  OfficeDocument: 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument',
+  OfficeDocument:
+    'http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument',
   Worksheet: 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet',
   CalcChain: 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/calcChain',
-  SharedStrings: 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/sharedStrings',
+  SharedStrings:
+    'http://schemas.openxmlformats.org/officeDocument/2006/relationships/sharedStrings',
   Styles: 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles',
   Theme: 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/theme',
   Hyperlink: 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/hyperlink',
   Image: 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/image',
-  CoreProperties: 'http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties',
-  ExtenderProperties: 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/extended-properties',
+  CoreProperties:
+    'http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties',
+  ExtenderProperties:
+    'http://schemas.openxmlformats.org/officeDocument/2006/relationships/extended-properties',
   Comments: 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/comments',
   VmlDrawing: 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/vmlDrawing',
   Table: 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/table',
diff --git a/lib/xlsx/xform/book/workbook-xform.js b/lib/xlsx/xform/book/workbook-xform.js
index 2047d72c8..5c10a5857 100644
--- a/lib/xlsx/xform/book/workbook-xform.js
+++ b/lib/xlsx/xform/book/workbook-xform.js
@@ -19,9 +19,17 @@ class WorkbookXform extends BaseXform {
     this.map = {
       fileVersion: WorkbookXform.STATIC_XFORMS.fileVersion,
       workbookPr: new WorkbookPropertiesXform(),
-      bookViews: new ListXform({tag: 'bookViews', count: false, childXform: new WorkbookViewXform()}),
+      bookViews: new ListXform({
+        tag: 'bookViews',
+        count: false,
+        childXform: new WorkbookViewXform(),
+      }),
       sheets: new ListXform({tag: 'sheets', count: false, childXform: new SheetXform()}),
-      definedNames: new ListXform({tag: 'definedNames', count: false, childXform: new DefinedNameXform()}),
+      definedNames: new ListXform({
+        tag: 'definedNames',
+        count: false,
+        childXform: new DefinedNameXform(),
+      }),
       calcPr: new WorkbookCalcPropertiesXform(),
     };
   }
@@ -45,7 +53,10 @@ class WorkbookXform extends BaseXform {
         });
       }
 
-      if (sheet.pageSetup && (sheet.pageSetup.printTitlesRow || sheet.pageSetup.printTitlesColumn)) {
+      if (
+        sheet.pageSetup &&
+        (sheet.pageSetup.printTitlesRow || sheet.pageSetup.printTitlesColumn)
+      ) {
         const ranges = [];
 
         if (sheet.pageSetup.printTitlesColumn) {
@@ -183,7 +194,9 @@ class WorkbookXform extends BaseXform {
             worksheet.pageSetup = {};
           }
           const range = colCache.decodeEx(definedName.ranges[0]);
-          worksheet.pageSetup.printArea = worksheet.pageSetup.printArea ? `${worksheet.pageSetup.printArea}&&${range.dimensions}` : range.dimensions;
+          worksheet.pageSetup.printArea = worksheet.pageSetup.printArea
+            ? `${worksheet.pageSetup.printArea}&&${range.dimensions}`
+            : range.dimensions;
         }
       } else if (definedName.name === '_xlnm.Print_Titles') {
         worksheet = worksheets[definedName.localSheetId];
diff --git a/lib/xlsx/xform/comment/vml-anchor-xform.js b/lib/xlsx/xform/comment/vml-anchor-xform.js
index 1ed68a02c..3e00136e0 100644
--- a/lib/xlsx/xform/comment/vml-anchor-xform.js
+++ b/lib/xlsx/xform/comment/vml-anchor-xform.js
@@ -31,7 +31,9 @@ class VmlAnchorXform extends BaseXform {
   }
 
   render(xmlStream, model) {
-    const rect = model.anchor ? this.getAnchorRect(model.anchor) : this.getDefaultRect(model.refAddress);
+    const rect = model.anchor
+      ? this.getAnchorRect(model.anchor)
+      : this.getDefaultRect(model.refAddress);
 
     xmlStream.leafNode('x:Anchor', null, rect.join(', '));
   }
diff --git a/lib/xlsx/xform/comment/vml-client-data-xform.js b/lib/xlsx/xform/comment/vml-client-data-xform.js
index 7fc24d353..f09a3c7fd 100644
--- a/lib/xlsx/xform/comment/vml-client-data-xform.js
+++ b/lib/xlsx/xform/comment/vml-client-data-xform.js
@@ -79,7 +79,11 @@ class VmlClientDataXform extends BaseXform {
   }
 
   normalizeModel() {
-    const position = Object.assign({}, this.map['x:MoveWithCells'].model, this.map['x:SizeWithCells'].model);
+    const position = Object.assign(
+      {},
+      this.map['x:MoveWithCells'].model,
+      this.map['x:SizeWithCells'].model
+    );
     const len = Object.keys(position).length;
     this.model.editAs = POSITION_TYPE[len];
     this.model.anchor = this.map['x:Anchor'].text;
diff --git a/lib/xlsx/xform/comment/vml-notes-xform.js b/lib/xlsx/xform/comment/vml-notes-xform.js
index 28fe95474..4b1a2ab9c 100644
--- a/lib/xlsx/xform/comment/vml-notes-xform.js
+++ b/lib/xlsx/xform/comment/vml-notes-xform.js
@@ -25,7 +25,12 @@ class VmlNotesXform extends BaseXform {
     xmlStream.leafNode('o:idmap', {'v:ext': 'edit', data: 1});
     xmlStream.closeNode();
 
-    xmlStream.openNode('v:shapetype', {id: '_x0000_t202', coordsize: '21600,21600', 'o:spt': 202, path: 'm,l,21600r21600,l21600,xe'});
+    xmlStream.openNode('v:shapetype', {
+      id: '_x0000_t202',
+      coordsize: '21600,21600',
+      'o:spt': 202,
+      path: 'm,l,21600r21600,l21600,xe',
+    });
     xmlStream.leafNode('v:stroke', {joinstyle: 'miter'});
     xmlStream.leafNode('v:path', {gradientshapeok: 't', 'o:connecttype': 'rect'});
     xmlStream.closeNode();
diff --git a/lib/xlsx/xform/comment/vml-shape-xform.js b/lib/xlsx/xform/comment/vml-shape-xform.js
index a34ad3136..6eb0bfeba 100644
--- a/lib/xlsx/xform/comment/vml-shape-xform.js
+++ b/lib/xlsx/xform/comment/vml-shape-xform.js
@@ -71,7 +71,8 @@ class VmlShapeXform extends BaseXform {
     switch (name) {
       case this.tag:
         this.model.margins.inset = this.map['v:textbox'].model && this.map['v:textbox'].model.inset;
-        this.model.protection = this.map['x:ClientData'].model && this.map['x:ClientData'].model.protection;
+        this.model.protection =
+          this.map['x:ClientData'].model && this.map['x:ClientData'].model.protection;
         this.model.anchor = this.map['x:ClientData'].model && this.map['x:ClientData'].model.anchor;
         this.model.editAs = this.map['x:ClientData'].model && this.map['x:ClientData'].model.editAs;
         return false;
@@ -84,7 +85,8 @@ class VmlShapeXform extends BaseXform {
 VmlShapeXform.V_SHAPE_ATTRIBUTES = (model, index) => ({
   id: `_x0000_s${1025 + index}`,
   type: '#_x0000_t202',
-  style: 'position:absolute; margin-left:105.3pt;margin-top:10.5pt;width:97.8pt;height:59.1pt;z-index:1;visibility:hidden',
+  style:
+    'position:absolute; margin-left:105.3pt;margin-top:10.5pt;width:97.8pt;height:59.1pt;z-index:1;visibility:hidden',
   fillcolor: 'infoBackground [80]',
   strokecolor: 'none [81]',
   'o:insetmode': model.note.margins && model.note.margins.insetmode,
diff --git a/lib/xlsx/xform/core/content-types-xform.js b/lib/xlsx/xform/core/content-types-xform.js
index d3babcf61..2999c62aa 100644
--- a/lib/xlsx/xform/core/content-types-xform.js
+++ b/lib/xlsx/xform/core/content-types-xform.js
@@ -21,7 +21,10 @@ class ContentTypesXform extends BaseXform {
       }
     });
 
-    xmlStream.leafNode('Default', {Extension: 'rels', ContentType: 'application/vnd.openxmlformats-package.relationships+xml'});
+    xmlStream.leafNode('Default', {
+      Extension: 'rels',
+      ContentType: 'application/vnd.openxmlformats-package.relationships+xml',
+    });
     xmlStream.leafNode('Default', {Extension: 'xml', ContentType: 'application/xml'});
 
     xmlStream.leafNode('Override', {
@@ -31,17 +34,27 @@ class ContentTypesXform extends BaseXform {
 
     model.worksheets.forEach(worksheet => {
       const name = `/xl/worksheets/sheet${worksheet.id}.xml`;
-      xmlStream.leafNode('Override', {PartName: name, ContentType: 'application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml'});
+      xmlStream.leafNode('Override', {
+        PartName: name,
+        ContentType: 'application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml',
+      });
     });
 
-    xmlStream.leafNode('Override', {PartName: '/xl/theme/theme1.xml', ContentType: 'application/vnd.openxmlformats-officedocument.theme+xml'});
-    xmlStream.leafNode('Override', {PartName: '/xl/styles.xml', ContentType: 'application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml'});
+    xmlStream.leafNode('Override', {
+      PartName: '/xl/theme/theme1.xml',
+      ContentType: 'application/vnd.openxmlformats-officedocument.theme+xml',
+    });
+    xmlStream.leafNode('Override', {
+      PartName: '/xl/styles.xml',
+      ContentType: 'application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml',
+    });
 
     const hasSharedStrings = model.sharedStrings && model.sharedStrings.count;
     if (hasSharedStrings) {
       xmlStream.leafNode('Override', {
         PartName: '/xl/sharedStrings.xml',
-        ContentType: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sharedStrings+xml',
+        ContentType:
+          'application/vnd.openxmlformats-officedocument.spreadsheetml.sharedStrings+xml',
       });
     }
 
@@ -77,8 +90,14 @@ class ContentTypesXform extends BaseXform {
       });
     }
 
-    xmlStream.leafNode('Override', {PartName: '/docProps/core.xml', ContentType: 'application/vnd.openxmlformats-package.core-properties+xml'});
-    xmlStream.leafNode('Override', {PartName: '/docProps/app.xml', ContentType: 'application/vnd.openxmlformats-officedocument.extended-properties+xml'});
+    xmlStream.leafNode('Override', {
+      PartName: '/docProps/core.xml',
+      ContentType: 'application/vnd.openxmlformats-package.core-properties+xml',
+    });
+    xmlStream.leafNode('Override', {
+      PartName: '/docProps/app.xml',
+      ContentType: 'application/vnd.openxmlformats-officedocument.extended-properties+xml',
+    });
 
     xmlStream.closeNode();
   }
diff --git a/lib/xlsx/xform/core/core-xform.js b/lib/xlsx/xform/core/core-xform.js
index 1edb90df8..cedde0f77 100644
--- a/lib/xlsx/xform/core/core-xform.js
+++ b/lib/xlsx/xform/core/core-xform.js
@@ -23,8 +23,16 @@ class CoreXform extends BaseXform {
       'cp:version': new StringXform({tag: 'cp:version'}),
       'cp:contentStatus': new StringXform({tag: 'cp:contentStatus'}),
       'cp:contentType': new StringXform({tag: 'cp:contentType'}),
-      'dcterms:created': new DateXform({tag: 'dcterms:created', attrs: CoreXform.DateAttrs, format: CoreXform.DateFormat}),
-      'dcterms:modified': new DateXform({tag: 'dcterms:modified', attrs: CoreXform.DateAttrs, format: CoreXform.DateFormat}),
+      'dcterms:created': new DateXform({
+        tag: 'dcterms:created',
+        attrs: CoreXform.DateAttrs,
+        format: CoreXform.DateFormat,
+      }),
+      'dcterms:modified': new DateXform({
+        tag: 'dcterms:modified',
+        attrs: CoreXform.DateAttrs,
+        format: CoreXform.DateFormat,
+      }),
     };
   }
 
diff --git a/lib/xlsx/xform/sheet/cell-xform.js b/lib/xlsx/xform/sheet/cell-xform.js
index 2e78bf36c..41715695a 100644
--- a/lib/xlsx/xform/sheet/cell-xform.js
+++ b/lib/xlsx/xform/sheet/cell-xform.js
@@ -107,7 +107,9 @@ class CellXform extends BaseXform {
         } else if (model.sharedFormula) {
           const master = options.formulae[model.sharedFormula];
           if (!master) {
-            throw new Error(`Shared Formula master must exist above and or left of clone for cell ${model.address}`);
+            throw new Error(
+              `Shared Formula master must exist above and or left of clone for cell ${model.address}`
+            );
           }
           if (master.si === undefined) {
             master.shareType = 'shared';
@@ -326,7 +328,9 @@ class CellXform extends BaseXform {
       case 'v':
       case 't':
         if (this.model.value && this.model.value.richText) {
-          this.model.value.richText.text = this.model.value.richText.text ? this.model.value.richText.text + text : text;
+          this.model.value.richText.text = this.model.value.richText.text
+            ? this.model.value.richText.text + text
+            : text;
         } else {
           this.model.value = this.model.value ? this.model.value + text : text;
         }
diff --git a/lib/xlsx/xform/sheet/cf-ext/conditional-formattings-ext-xform.js b/lib/xlsx/xform/sheet/cf-ext/conditional-formattings-ext-xform.js
index 1d1db23b8..77d32b118 100644
--- a/lib/xlsx/xform/sheet/cf-ext/conditional-formattings-ext-xform.js
+++ b/lib/xlsx/xform/sheet/cf-ext/conditional-formattings-ext-xform.js
@@ -1,50 +1,50 @@
-const CompositeXform = require('../../composite-xform');
-
-const CfRuleExtXform = require('./cf-rule-ext-xform');
-const ConditionalFormattingExtXform = require('./conditional-formatting-ext-xform');
-
-class ConditionalFormattingsExtXform extends CompositeXform {
-  constructor() {
-    super();
-
-    this.map = {
-      'x14:conditionalFormatting': (this.cfXform = new ConditionalFormattingExtXform()),
-    };
-  }
-
-  get tag() {
-    return 'x14:conditionalFormattings';
-  }
-
-  hasContent(model) {
-    if (model.hasExtContent === undefined) {
-      model.hasExtContent = model.some(cf => cf.rules.some(CfRuleExtXform.isExt));
-    }
-    return model.hasExtContent;
-  }
-
-  prepare(model, options) {
-    model.forEach(cf => {
-      this.cfXform.prepare(cf, options);
-    });
-  }
-
-  render(xmlStream, model) {
-    if (this.hasContent(model)) {
-      xmlStream.openNode(this.tag);
-      model.forEach(cf => this.cfXform.render(xmlStream, cf));
-      xmlStream.closeNode();
-    }
-  }
-
-  createNewModel() {
-    return [];
-  }
-
-  onParserClose(name, parser) {
-    // model is array of conditional formatting objects
-    this.model.push(parser.model);
-  }
-}
-
-module.exports = ConditionalFormattingsExtXform;
+const CompositeXform = require('../../composite-xform');
+
+const CfRuleExtXform = require('./cf-rule-ext-xform');
+const ConditionalFormattingExtXform = require('./conditional-formatting-ext-xform');
+
+class ConditionalFormattingsExtXform extends CompositeXform {
+  constructor() {
+    super();
+
+    this.map = {
+      'x14:conditionalFormatting': (this.cfXform = new ConditionalFormattingExtXform()),
+    };
+  }
+
+  get tag() {
+    return 'x14:conditionalFormattings';
+  }
+
+  hasContent(model) {
+    if (model.hasExtContent === undefined) {
+      model.hasExtContent = model.some(cf => cf.rules.some(CfRuleExtXform.isExt));
+    }
+    return model.hasExtContent;
+  }
+
+  prepare(model, options) {
+    model.forEach(cf => {
+      this.cfXform.prepare(cf, options);
+    });
+  }
+
+  render(xmlStream, model) {
+    if (this.hasContent(model)) {
+      xmlStream.openNode(this.tag);
+      model.forEach(cf => this.cfXform.render(xmlStream, cf));
+      xmlStream.closeNode();
+    }
+  }
+
+  createNewModel() {
+    return [];
+  }
+
+  onParserClose(name, parser) {
+    // model is array of conditional formatting objects
+    this.model.push(parser.model);
+  }
+}
+
+module.exports = ConditionalFormattingsExtXform;
diff --git a/lib/xlsx/xform/sheet/cf-ext/databar-ext-xform.js b/lib/xlsx/xform/sheet/cf-ext/databar-ext-xform.js
index 05feeb3e6..0901c5ab0 100644
--- a/lib/xlsx/xform/sheet/cf-ext/databar-ext-xform.js
+++ b/lib/xlsx/xform/sheet/cf-ext/databar-ext-xform.js
@@ -11,8 +11,12 @@ class DatabarExtXform extends CompositeXform {
     this.map = {
       'x14:cfvo': (this.cfvoXform = new CfvoExtXform()),
       'x14:borderColor': (this.borderColorXform = new ColorXform('x14:borderColor')),
-      'x14:negativeBorderColor': (this.negativeBorderColorXform = new ColorXform('x14:negativeBorderColor')),
-      'x14:negativeFillColor': (this.negativeFillColorXform = new ColorXform('x14:negativeFillColor')),
+      'x14:negativeBorderColor': (this.negativeBorderColorXform = new ColorXform(
+        'x14:negativeBorderColor'
+      )),
+      'x14:negativeFillColor': (this.negativeFillColorXform = new ColorXform(
+        'x14:negativeFillColor'
+      )),
       'x14:axisColor': (this.axisColorXform = new ColorXform('x14:axisColor')),
     };
   }
@@ -33,8 +37,14 @@ class DatabarExtXform extends CompositeXform {
       maxLength: BaseXform.toIntAttribute(model.maxLength, 100, true),
       border: BaseXform.toBoolAttribute(model.border, false),
       gradient: BaseXform.toBoolAttribute(model.gradient, true),
-      negativeBarColorSameAsPositive: BaseXform.toBoolAttribute(model.negativeBarColorSameAsPositive, true),
-      negativeBarBorderColorSameAsPositive: BaseXform.toBoolAttribute(model.negativeBarBorderColorSameAsPositive, true),
+      negativeBarColorSameAsPositive: BaseXform.toBoolAttribute(
+        model.negativeBarColorSameAsPositive,
+        true
+      ),
+      negativeBarBorderColorSameAsPositive: BaseXform.toBoolAttribute(
+        model.negativeBarBorderColorSameAsPositive,
+        true
+      ),
       axisPosition: BaseXform.toAttribute(model.axisPosition, 'auto'),
       direction: BaseXform.toAttribute(model.direction, 'leftToRight'),
     });
@@ -58,8 +68,14 @@ class DatabarExtXform extends CompositeXform {
       maxLength: BaseXform.toIntValue(attributes.maxLength, 100),
       border: BaseXform.toBoolValue(attributes.border, false),
       gradient: BaseXform.toBoolValue(attributes.gradient, true),
-      negativeBarColorSameAsPositive: BaseXform.toBoolValue(attributes.negativeBarColorSameAsPositive, true),
-      negativeBarBorderColorSameAsPositive: BaseXform.toBoolValue(attributes.negativeBarBorderColorSameAsPositive, true),
+      negativeBarColorSameAsPositive: BaseXform.toBoolValue(
+        attributes.negativeBarColorSameAsPositive,
+        true
+      ),
+      negativeBarBorderColorSameAsPositive: BaseXform.toBoolValue(
+        attributes.negativeBarBorderColorSameAsPositive,
+        true
+      ),
       axisPosition: BaseXform.toStringValue(attributes.axisPosition, 'auto'),
       direction: BaseXform.toStringValue(attributes.direction, 'leftToRight'),
     };
diff --git a/lib/xlsx/xform/sheet/cf/conditional-formattings-xform.js b/lib/xlsx/xform/sheet/cf/conditional-formattings-xform.js
index 9786f9bf0..548b16f63 100644
--- a/lib/xlsx/xform/sheet/cf/conditional-formattings-xform.js
+++ b/lib/xlsx/xform/sheet/cf/conditional-formattings-xform.js
@@ -1,89 +1,92 @@
-const BaseXform = require('../../base-xform');
-
-const ConditionalFormattingXform = require('./conditional-formatting-xform');
-
-class ConditionalFormattingsXform extends BaseXform {
-  constructor() {
-    super();
-
-    this.cfXform = new ConditionalFormattingXform();
-  }
-
-  get tag() {
-    return 'conditionalFormatting';
-  }
-
-  reset() {
-    this.model = [];
-  }
-
-  prepare(model, options) {
-    // ensure each rule has a priority value
-    let nextPriority = model.reduce((p, cf) => Math.max(p, ...cf.rules.map(rule => rule.priority || 0)), 1);
-    model.forEach(cf => {
-      cf.rules.forEach(rule => {
-        if (!rule.priority) {
-          rule.priority = nextPriority++;
-        }
-
-        if (rule.style) {
-          rule.dxfId = options.styles.addDxfStyle(rule.style);
-        }
-      });
-    });
-  }
-
-  render(xmlStream, model) {
-    model.forEach(cf => {
-      this.cfXform.render(xmlStream, cf);
-    });
-  }
-
-  parseOpen(node) {
-    if (this.parser) {
-      this.parser.parseOpen(node);
-      return true;
-    }
-
-    switch (node.name) {
-      case 'conditionalFormatting':
-        this.parser = this.cfXform;
-        this.parser.parseOpen(node);
-        return true;
-
-      default:
-        return false;
-    }
-  }
-
-  parseText(text) {
-    if (this.parser) {
-      this.parser.parseText(text);
-    }
-  }
-
-  parseClose(name) {
-    if (this.parser) {
-      if (!this.parser.parseClose(name)) {
-        this.model.push(this.parser.model);
-        this.parser = undefined;
-        return false;
-      }
-      return true;
-    }
-    return false;
-  }
-
-  reconcile(model, options) {
-    model.forEach(cf => {
-      cf.rules.forEach(rule => {
-        if (rule.dxfId !== undefined) {
-          rule.style = options.styles.getDxfStyle(rule.dxfId);
-          delete rule.dxfId;
-        }
-      });
-    });
-  }
-}
-
-module.exports = ConditionalFormattingsXform;
+const BaseXform = require('../../base-xform');
+
+const ConditionalFormattingXform = require('./conditional-formatting-xform');
+
+class ConditionalFormattingsXform extends BaseXform {
+  constructor() {
+    super();
+
+    this.cfXform = new ConditionalFormattingXform();
+  }
+
+  get tag() {
+    return 'conditionalFormatting';
+  }
+
+  reset() {
+    this.model = [];
+  }
+
+  prepare(model, options) {
+    // ensure each rule has a priority value
+    let nextPriority = model.reduce(
+      (p, cf) => Math.max(p, ...cf.rules.map(rule => rule.priority || 0)),
+      1
+    );
+    model.forEach(cf => {
+      cf.rules.forEach(rule => {
+        if (!rule.priority) {
+          rule.priority = nextPriority++;
+        }
+
+        if (rule.style) {
+          rule.dxfId = options.styles.addDxfStyle(rule.style);
+        }
+      });
+    });
+  }
+
+  render(xmlStream, model) {
+    model.forEach(cf => {
+      this.cfXform.render(xmlStream, cf);
+    });
+  }
+
+  parseOpen(node) {
+    if (this.parser) {
+      this.parser.parseOpen(node);
+      return true;
+    }
+
+    switch (node.name) {
+      case 'conditionalFormatting':
+        this.parser = this.cfXform;
+        this.parser.parseOpen(node);
+        return true;
+
+      default:
+        return false;
+    }
+  }
+
+  parseText(text) {
+    if (this.parser) {
+      this.parser.parseText(text);
+    }
+  }
+
+  parseClose(name) {
+    if (this.parser) {
+      if (!this.parser.parseClose(name)) {
+        this.model.push(this.parser.model);
+        this.parser = undefined;
+        return false;
+      }
+      return true;
+    }
+    return false;
+  }
+
+  reconcile(model, options) {
+    model.forEach(cf => {
+      cf.rules.forEach(rule => {
+        if (rule.dxfId !== undefined) {
+          rule.style = options.styles.getDxfStyle(rule.dxfId);
+          delete rule.dxfId;
+        }
+      });
+    });
+  }
+}
+
+module.exports = ConditionalFormattingsXform;
diff --git a/lib/xlsx/xform/sheet/col-xform.js b/lib/xlsx/xform/sheet/col-xform.js
index fe87f4dc8..93003cbdf 100644
--- a/lib/xlsx/xform/sheet/col-xform.js
+++ b/lib/xlsx/xform/sheet/col-xform.js
@@ -43,12 +43,20 @@ class ColXform extends BaseXform {
       const model = (this.model = {
         min: parseInt(node.attributes.min || '0', 10),
         max: parseInt(node.attributes.max || '0', 10),
-        width: node.attributes.width === undefined ? undefined : parseFloat(node.attributes.width || '0'),
+        width:
+          node.attributes.width === undefined
+            ? undefined
+            : parseFloat(node.attributes.width || '0'),
       });
       if (node.attributes.style) {
         model.styleId = parseInt(node.attributes.style, 10);
       }
-      if (node.attributes.hidden === true || node.attributes.hidden === 'true' || node.attributes.hidden === 1 || node.attributes.hidden === '1') {
+      if (
+        node.attributes.hidden === true ||
+        node.attributes.hidden === 'true' ||
+        node.attributes.hidden === 1 ||
+        node.attributes.hidden === '1'
+      ) {
         model.hidden = true;
       }
       if (node.attributes.bestFit) {
diff --git a/lib/xlsx/xform/sheet/outline-properties-xform.js b/lib/xlsx/xform/sheet/outline-properties-xform.js
index b494c2490..59de15266 100644
--- a/lib/xlsx/xform/sheet/outline-properties-xform.js
+++ b/lib/xlsx/xform/sheet/outline-properties-xform.js
@@ -21,8 +21,12 @@ class OutlinePropertiesXform extends BaseXform {
   parseOpen(node) {
     if (node.name === this.tag) {
       this.model = {
-        summaryBelow: isDefined(node.attributes.summaryBelow) ? Boolean(Number(node.attributes.summaryBelow)) : undefined,
-        summaryRight: isDefined(node.attributes.summaryRight) ? Boolean(Number(node.attributes.summaryRight)) : undefined,
+        summaryBelow: isDefined(node.attributes.summaryBelow)
+          ? Boolean(Number(node.attributes.summaryBelow))
+          : undefined,
+        summaryRight: isDefined(node.attributes.summaryRight)
+          ? Boolean(Number(node.attributes.summaryRight))
+          : undefined,
       };
       return true;
     }
diff --git a/lib/xlsx/xform/sheet/row-xform.js b/lib/xlsx/xform/sheet/row-xform.js
index c278839f1..4ccb73fee 100644
--- a/lib/xlsx/xform/sheet/row-xform.js
+++ b/lib/xlsx/xform/sheet/row-xform.js
@@ -67,7 +67,9 @@ class RowXform extends BaseXform {
     }
     if (node.name === 'row') {
       this.numRowsSeen += 1;
-      const spans = node.attributes.spans ? node.attributes.spans.split(':').map(span => parseInt(span, 10)) : [undefined, undefined];
+      const spans = node.attributes.spans
+        ? node.attributes.spans.split(':').map(span => parseInt(span, 10))
+        : [undefined, undefined];
       const model = (this.model = {
         number: parseInt(node.attributes.r, 10),
         min: spans[0],
@@ -77,7 +79,12 @@ class RowXform extends BaseXform {
       if (node.attributes.s) {
         model.styleId = parseInt(node.attributes.s, 10);
       }
-      if (node.attributes.hidden === true || node.attributes.hidden === 'true' || node.attributes.hidden === 1 || node.attributes.hidden === '1') {
+      if (
+        node.attributes.hidden === true ||
+        node.attributes.hidden === 'true' ||
+        node.attributes.hidden === 1 ||
+        node.attributes.hidden === '1'
+      ) {
         model.hidden = true;
       }
       if (node.attributes.bestFit) {
diff --git a/lib/xlsx/xform/sheet/sheet-view-xform.js b/lib/xlsx/xform/sheet/sheet-view-xform.js
index 7e6db038d..f53fdcd1f 100644
--- a/lib/xlsx/xform/sheet/sheet-view-xform.js
+++ b/lib/xlsx/xform/sheet/sheet-view-xform.js
@@ -50,7 +50,10 @@ class SheetViewXform extends BaseXform {
         xSplit = model.xSplit || 0;
         ySplit = model.ySplit || 0;
         topLeftCell = model.topLeftCell || colCache.getAddress(ySplit + 1, xSplit + 1).address;
-        activePane = (model.xSplit && model.ySplit && 'bottomRight') || (model.xSplit && 'topRight') || 'bottomLeft';
+        activePane =
+          (model.xSplit && model.ySplit && 'bottomRight') ||
+          (model.xSplit && 'topRight') ||
+          'bottomLeft';
 
         xmlStream.leafNode('pane', {
           xSplit: model.xSplit || undefined,
diff --git a/lib/xlsx/xform/sheet/worksheet-xform.js b/lib/xlsx/xform/sheet/worksheet-xform.js
index bf68ab725..4b36e37ba 100644
--- a/lib/xlsx/xform/sheet/worksheet-xform.js
+++ b/lib/xlsx/xform/sheet/worksheet-xform.js
@@ -96,7 +96,11 @@ class WorkSheetXform extends BaseXform {
     this.map = {
       sheetPr: new SheetPropertiesXform(),
       dimension: new DimensionXform(),
-      sheetViews: new ListXform({tag: 'sheetViews', count: false, childXform: new SheetViewXform()}),
+      sheetViews: new ListXform({
+        tag: 'sheetViews',
+        count: false,
+        childXform: new SheetViewXform(),
+      }),
       sheetFormatPr: new SheetFormatPropertiesXform(),
       cols: new ListXform({tag: 'cols', count: false, childXform: new ColXform()}),
       sheetData: new ListXform({
@@ -109,7 +113,11 @@ class WorkSheetXform extends BaseXform {
       autoFilter: new AutoFilterXform(),
       mergeCells: new ListXform({tag: 'mergeCells', count: true, childXform: new MergeCellXform()}),
       rowBreaks: new RowBreaksXform(),
-      hyperlinks: new ListXform({tag: 'hyperlinks', count: false, childXform: new HyperlinkXform()}),
+      hyperlinks: new ListXform({
+        tag: 'hyperlinks',
+        count: false,
+        childXform: new HyperlinkXform(),
+      }),
       pageMargins: new PageMarginsXform(),
       dataValidations: new DataValidationsXform(),
       pageSetup: new PageSetupXform(),
@@ -212,7 +220,10 @@ class WorkSheetXform extends BaseXform {
             Target: `../drawings/${drawing.name}.xml`,
           });
         }
-        let rIdImage = this.preImageId === medium.imageId ? drawingRelsHash[medium.imageId] : drawingRelsHash[drawing.rels.length];
+        let rIdImage =
+          this.preImageId === medium.imageId
+            ? drawingRelsHash[medium.imageId]
+            : drawingRelsHash[drawing.rels.length];
         if (!rIdImage) {
           rIdImage = nextRid(drawing.rels);
           drawingRelsHash[drawing.rels.length] = rIdImage;
@@ -387,10 +398,18 @@ class WorkSheetXform extends BaseXform {
           properties.outlineProperties = this.map.sheetPr.model.outlineProperties;
         }
         const sheetProperties = {
-          fitToPage: (this.map.sheetPr.model && this.map.sheetPr.model.pageSetup && this.map.sheetPr.model.pageSetup.fitToPage) || false,
+          fitToPage:
+            (this.map.sheetPr.model &&
+              this.map.sheetPr.model.pageSetup &&
+              this.map.sheetPr.model.pageSetup.fitToPage) ||
+            false,
           margins: this.map.pageMargins.model,
         };
-        const pageSetup = Object.assign(sheetProperties, this.map.pageSetup.model, this.map.printOptions.model);
+        const pageSetup = Object.assign(
+          sheetProperties,
+          this.map.pageSetup.model,
+          this.map.printOptions.model
+        );
         const conditionalFormattings = mergeConditionalFormattings(
           this.map.conditionalFormatting.model,
           this.map.extLst.model && this.map.extLst.model['x14:conditionalFormattings']
diff --git a/lib/xlsx/xform/strings/text-xform.js b/lib/xlsx/xform/strings/text-xform.js
index 5482f21ff..7604306e1 100644
--- a/lib/xlsx/xform/strings/text-xform.js
+++ b/lib/xlsx/xform/strings/text-xform.js
@@ -17,7 +17,9 @@ class TextXform extends BaseXform {
   }
 
   get model() {
-    return this._text.join('').replace(/_x([0-9A-F]{4})_/g, ($0, $1) => String.fromCharCode(parseInt($1, 16)));
+    return this._text
+      .join('')
+      .replace(/_x([0-9A-F]{4})_/g, ($0, $1) => String.fromCharCode(parseInt($1, 16)));
   }
 
   parseOpen(node) {
diff --git a/lib/xlsx/xform/style/alignment-xform.js b/lib/xlsx/xform/style/alignment-xform.js
index a38b3daab..6cd7eb11a 100644
--- a/lib/xlsx/xform/style/alignment-xform.js
+++ b/lib/xlsx/xform/style/alignment-xform.js
@@ -4,7 +4,15 @@ const utils = require('../../../utils/utils');
 const BaseXform = require('../base-xform');
 
 const validation = {
-  horizontalValues: ['left', 'center', 'right', 'fill', 'centerContinuous', 'distributed', 'justify'].reduce((p, v) => {
+  horizontalValues: [
+    'left',
+    'center',
+    'right',
+    'fill',
+    'centerContinuous',
+    'distributed',
+    'justify',
+  ].reduce((p, v) => {
     p[v] = true;
     return p;
   }, {}),
@@ -132,12 +140,24 @@ class AlignmentXform extends BaseXform {
       }
     }
     add(node.attributes.horizontal, 'horizontal', node.attributes.horizontal);
-    add(node.attributes.vertical, 'vertical', node.attributes.vertical === 'center' ? 'middle' : node.attributes.vertical);
+    add(
+      node.attributes.vertical,
+      'vertical',
+      node.attributes.vertical === 'center' ? 'middle' : node.attributes.vertical
+    );
     add(node.attributes.wrapText, 'wrapText', !!node.attributes.wrapText);
     add(node.attributes.shrinkToFit, 'shrinkToFit', !!node.attributes.shrinkToFit);
     add(node.attributes.indent, 'indent', parseInt(node.attributes.indent, 10));
-    add(node.attributes.textRotation, 'textRotation', textRotationXform.toModel(node.attributes.textRotation));
-    add(node.attributes.readingOrder, 'readingOrder', node.attributes.readingOrder === '2' ? 'rtl' : 'ltr');
+    add(
+      node.attributes.textRotation,
+      'textRotation',
+      textRotationXform.toModel(node.attributes.textRotation)
+    );
+    add(
+      node.attributes.readingOrder,
+      'readingOrder',
+      node.attributes.readingOrder === '2' ? 'rtl' : 'ltr'
+    );
 
     this.model = valid ? model : null;
   }
diff --git a/lib/xlsx/xform/style/font-xform.js b/lib/xlsx/xform/style/font-xform.js
index 0d71f47ff..56cf006c8 100644
--- a/lib/xlsx/xform/style/font-xform.js
+++ b/lib/xlsx/xform/style/font-xform.js
@@ -32,7 +32,10 @@ class FontXform extends BaseXform {
       strike: {prop: 'strike', xform: new BooleanXform({tag: 'strike', attr: 'val'})},
       sz: {prop: 'size', xform: new IntegerXform({tag: 'sz', attr: 'val'})},
     };
-    this.map[this.options.fontNameTag] = {prop: 'name', xform: new StringXform({tag: this.options.fontNameTag, attr: 'val'})};
+    this.map[this.options.fontNameTag] = {
+      prop: 'name',
+      xform: new StringXform({tag: this.options.fontNameTag, attr: 'val'}),
+    };
   }
 
   get tag() {
diff --git a/lib/xlsx/xform/style/styles-xform.js b/lib/xlsx/xform/style/styles-xform.js
index 6380c12f7..e1071c424 100644
--- a/lib/xlsx/xform/style/styles-xform.js
+++ b/lib/xlsx/xform/style/styles-xform.js
@@ -24,11 +24,20 @@ class StylesXform extends BaseXform {
 
     this.map = {
       numFmts: new ListXform({tag: 'numFmts', count: true, childXform: new NumFmtXform()}),
-      fonts: new ListXform({tag: 'fonts', count: true, childXform: new FontXform(), $: {'x14ac:knownFonts': 1}}),
+      fonts: new ListXform({
+        tag: 'fonts',
+        count: true,
+        childXform: new FontXform(),
+        $: {'x14ac:knownFonts': 1},
+      }),
       fills: new ListXform({tag: 'fills', count: true, childXform: new FillXform()}),
       borders: new ListXform({tag: 'borders', count: true, childXform: new BorderXform()}),
       cellStyleXfs: new ListXform({tag: 'cellStyleXfs', count: true, childXform: new StyleXform()}),
-      cellXfs: new ListXform({tag: 'cellXfs', count: true, childXform: new StyleXform({xfId: true})}),
+      cellXfs: new ListXform({
+        tag: 'cellXfs',
+        count: true,
+        childXform: new StyleXform({xfId: true}),
+      }),
       dxfs: new ListXform({tag: 'dxfs', always: true, count: true, childXform: new DxfXform()}),
 
       // for style manager
@@ -126,7 +135,9 @@ class StylesXform extends BaseXform {
       });
       xmlStream.closeNode();
 
-      this.map.cellStyleXfs.render(xmlStream, [{numFmtId: 0, fontId: 0, fillId: 0, borderId: 0, xfId: 0}]);
+      this.map.cellStyleXfs.render(xmlStream, [
+        {numFmtId: 0, fontId: 0, fillId: 0, borderId: 0, xfId: 0},
+      ]);
 
       xmlStream.openNode('cellXfs', {count: model.styles.length});
       model.styles.forEach(styleXml => {
@@ -139,7 +150,9 @@ class StylesXform extends BaseXform {
       this.map.fonts.render(xmlStream, model.fonts);
       this.map.fills.render(xmlStream, model.fills);
       this.map.borders.render(xmlStream, model.borders);
-      this.map.cellStyleXfs.render(xmlStream, [{numFmtId: 0, fontId: 0, fillId: 0, borderId: 0, xfId: 0}]);
+      this.map.cellStyleXfs.render(xmlStream, [
+        {numFmtId: 0, fontId: 0, fillId: 0, borderId: 0, xfId: 0},
+      ]);
       this.map.cellXfs.render(xmlStream, model.styles);
     }
 
@@ -300,7 +313,8 @@ class StylesXform extends BaseXform {
     // -------------------------------------------------------
     // number format
     if (style.numFmtId) {
-      const numFmt = this.index.numFmt[style.numFmtId] || NumFmtXform.getDefaultFmtCode(style.numFmtId);
+      const numFmt =
+        this.index.numFmt[style.numFmtId] || NumFmtXform.getDefaultFmtCode(style.numFmtId);
       if (numFmt) {
         model.numFmt = numFmt;
       }
@@ -419,20 +433,33 @@ StylesXform.STYLESHEET_ATTRIBUTES = {
   'xmlns:x16r2': 'http://schemas.microsoft.com/office/spreadsheetml/2015/02/main',
 };
 StylesXform.STATIC_XFORMS = {
-  cellStyles: new StaticXform({tag: 'cellStyles', $: {count: 1}, c: [{tag: 'cellStyle', $: {name: 'Normal', xfId: 0, builtinId: 0}}]}),
+  cellStyles: new StaticXform({
+    tag: 'cellStyles',
+    $: {count: 1},
+    c: [{tag: 'cellStyle', $: {name: 'Normal', xfId: 0, builtinId: 0}}],
+  }),
   dxfs: new StaticXform({tag: 'dxfs', $: {count: 0}}),
-  tableStyles: new StaticXform({tag: 'tableStyles', $: {count: 0, defaultTableStyle: 'TableStyleMedium2', defaultPivotStyle: 'PivotStyleLight16'}}),
+  tableStyles: new StaticXform({
+    tag: 'tableStyles',
+    $: {count: 0, defaultTableStyle: 'TableStyleMedium2', defaultPivotStyle: 'PivotStyleLight16'},
+  }),
   extLst: new StaticXform({
     tag: 'extLst',
     c: [
       {
         tag: 'ext',
-        $: {uri: '{EB79DEF2-80B8-43e5-95BD-54CBDDF9020C}', 'xmlns:x14': 'http://schemas.microsoft.com/office/spreadsheetml/2009/9/main'},
+        $: {
+          uri: '{EB79DEF2-80B8-43e5-95BD-54CBDDF9020C}',
+          'xmlns:x14': 'http://schemas.microsoft.com/office/spreadsheetml/2009/9/main',
+        },
         c: [{tag: 'x14:slicerStyles', $: {defaultSlicerStyle: 'SlicerStyleLight1'}}],
       },
       {
         tag: 'ext',
-        $: {uri: '{9260A510-F301-46a8-8635-F512D64BE5F5}', 'xmlns:x15': 'http://schemas.microsoft.com/office/spreadsheetml/2010/11/main'},
+        $: {
+          uri: '{9260A510-F301-46a8-8635-F512D64BE5F5}',
+          'xmlns:x15': 'http://schemas.microsoft.com/office/spreadsheetml/2010/11/main',
+        },
         c: [{tag: 'x15:timelineStyles', $: {defaultTimelineStyle: 'TimeSlicerStyleLight1'}}],
       },
     ],
diff --git a/lib/xlsx/xlsx.js b/lib/xlsx/xlsx.js
index c9c9d411d..5a81b4415 100644
--- a/lib/xlsx/xlsx.js
+++ b/lib/xlsx/xlsx.js
@@ -495,11 +495,19 @@ class XLSX {
       {Id: `rId${count++}`, Type: XLSX.RelType.Theme, Target: 'theme/theme1.xml'},
     ];
     if (model.sharedStrings.count) {
-      relationships.push({Id: `rId${count++}`, Type: XLSX.RelType.SharedStrings, Target: 'sharedStrings.xml'});
+      relationships.push({
+        Id: `rId${count++}`,
+        Type: XLSX.RelType.SharedStrings,
+        Target: 'sharedStrings.xml',
+      });
     }
     model.worksheets.forEach(worksheet => {
       worksheet.rId = `rId${count++}`;
-      relationships.push({Id: worksheet.rId, Type: XLSX.RelType.Worksheet, Target: `worksheets/sheet${worksheet.id}.xml`});
+      relationships.push({
+        Id: worksheet.rId,
+        Type: XLSX.RelType.Worksheet,
+        Target: `worksheets/sheet${worksheet.id}.xml`,
+      });
     });
     const xform = new RelationshipsXform();
     const xml = xform.toXml(relationships);
@@ -572,7 +580,8 @@ class XLSX {
     model.created = model.created || new Date();
     model.modified = model.modified || new Date();
 
-    model.useSharedStrings = options.useSharedStrings !== undefined ? options.useSharedStrings : true;
+    model.useSharedStrings =
+      options.useSharedStrings !== undefined ? options.useSharedStrings : true;
     model.useStyles = options.useStyles !== undefined ? options.useStyles : true;
 
     // Manage the shared strings
diff --git a/package.json b/package.json
index ae555aeb2..01f45102a 100644
--- a/package.json
+++ b/package.json
@@ -96,23 +96,23 @@
     "pageSetup"
   ],
   "dependencies": {
-    "archiver": "^4.0.2",
+    "archiver": "^5.0.0",
     "dayjs": "^1.8.34",
     "fast-csv": "^4.3.1",
-    "jszip": "^3.4.0",
+    "jszip": "^3.5.0",
     "readable-stream": "^3.6.0",
     "saxes": "^5.0.1",
     "tmp": "^0.2.0",
     "unzipper": "^0.10.11",
-    "uuid": "^7.0.3"
+    "uuid": "^8.3.0"
   },
   "devDependencies": {
     "@babel/cli": "^7.10.5",
     "@babel/core": "^7.11.4",
     "@babel/preset-env": "^7.11.0",
     "@types/chai": "^4.2.12",
-    "@types/mocha": "^7.0.2",
-    "@types/node": "^13.13.15",
+    "@types/mocha": "^8.0.3",
+    "@types/node": "^14.11.2",
     "babelify": "^10.0.0",
     "browserify": "^16.5.2",
     "chai": "^4.2.0",
@@ -121,8 +121,8 @@
     "core-js": "^3.6.5",
     "dirty-chai": "^2.0.1",
     "eslint": "^6.5.1",
-    "eslint-config-airbnb-base": "^14.1.0",
-    "eslint-config-prettier": "^6.11.0",
+    "eslint-config-airbnb-base": "^14.2.0",
+    "eslint-config-prettier": "^6.12.0",
     "eslint-friendly-formatter": "^4.0.1",
     "eslint-plugin-import": "^2.22.0",
     "eslint-plugin-node": "^11.1.0",
@@ -132,16 +132,16 @@
     "grunt-babel": "^8.0.0",
     "grunt-browserify": "^5.3.0",
     "grunt-contrib-copy": "^1.0.0",
-    "grunt-contrib-jasmine": "^2.1.0",
+    "grunt-contrib-jasmine": "^2.2.0",
     "grunt-contrib-watch": "^1.1.0",
     "grunt-terser": "^1.0.0",
-    "husky": "^4.2.5",
+    "husky": "^4.3.0",
     "lint-staged": "^10.2.13",
-    "mocha": "^7.1.1",
-    "prettier-eslint": "^9.0.0",
+    "mocha": "^7.2.0",
+    "prettier-eslint": "^11.0.0",
     "prettier-eslint-cli": "^5.0.0",
     "regenerator-runtime": "^0.13.7",
-    "ts-node": "^8.9.0",
+    "ts-node": "^8.10.2",
     "typescript": "^3.9.7"
   }
 }
diff --git a/spec/integration/issues/issue-1328-xlsx-worksheet-reader-date.spec.js b/spec/integration/issues/issue-1328-xlsx-worksheet-reader-date.spec.js
index 2337fc790..acfa4da74 100644
--- a/spec/integration/issues/issue-1328-xlsx-worksheet-reader-date.spec.js
+++ b/spec/integration/issues/issue-1328-xlsx-worksheet-reader-date.spec.js
@@ -1,20 +1,33 @@
 const ExcelJS = verquire('exceljs');
 const fs = require('fs');
 
-
 describe('github issues: Date field with cache style', () => {
   const rows = [];
-  beforeEach(() =>
-    new Promise((resolve, reject) => {
-      const workbookReader = new ExcelJS.stream.xlsx.WorkbookReader(fs.createReadStream('./spec/integration/data/dateIssue.xlsx'), { worksheets: 'emit', styles: 'cache', sharedStrings: 'cache', hyperlinks: 'ignore', entries: 'ignore' });
-      workbookReader.read();
-      workbookReader.on('worksheet', worksheet => worksheet.on('row', row => rows.push(row.values[1])));
-      workbookReader.on('end', resolve);
-      workbookReader.on('error', reject);
-
-    })
+  beforeEach(
+    () =>
+      new Promise((resolve, reject) => {
+        const workbookReader = new ExcelJS.stream.xlsx.WorkbookReader(
+          fs.createReadStream('./spec/integration/data/dateIssue.xlsx'),
+          {
+            worksheets: 'emit',
+            styles: 'cache',
+            sharedStrings: 'cache',
+            hyperlinks: 'ignore',
+            entries: 'ignore',
+          }
+        );
+        workbookReader.read();
+        workbookReader.on('worksheet', worksheet =>
+          worksheet.on('row', row => rows.push(row.values[1]))
+        );
+        workbookReader.on('end', resolve);
+        workbookReader.on('error', reject);
+      })
   );
   it('issue 1328 - should emit row with Date Object', () => {
-    expect(rows).that.deep.equals(['Date', new Date('2020-11-20T00:00:00.000Z')]);
+    expect(rows).that.deep.equals([
+      'Date',
+      new Date('2020-11-20T00:00:00.000Z'),
+    ]);
   });
 });
diff --git a/spec/integration/issues/issue-771-data-validation-without-type.spec.js b/spec/integration/issues/issue-771-data-validation-without-type.spec.js
index a46505c16..9e48b3700 100644
--- a/spec/integration/issues/issue-771-data-validation-without-type.spec.js
+++ b/spec/integration/issues/issue-771-data-validation-without-type.spec.js
@@ -3,8 +3,6 @@ const ExcelJS = verquire('exceljs');
 describe('github issues', () => {
   it('issue 771 - Issue with dataValidation without type and with formula1 or formula2', () => {
     const wb = new ExcelJS.Workbook();
-    return wb.xlsx
-      .readFile('./spec/integration/data/test-issue-771.xlsx');
+    return wb.xlsx.readFile('./spec/integration/data/test-issue-771.xlsx');
   });
 });
-
diff --git a/spec/integration/pr/test-pr-1431.spec.js b/spec/integration/pr/test-pr-1431.spec.js
index 631a49839..5c3708f92 100644
--- a/spec/integration/pr/test-pr-1431.spec.js
+++ b/spec/integration/pr/test-pr-1431.spec.js
@@ -24,13 +24,16 @@ describe('github issues', () => {
     await workbook.commit();
 
     return new Promise((resolve, reject) => {
-      const workbookReader = new ExcelJS.stream.xlsx.WorkbookReader('./test.xlsx', {
-        entries: 'emit',
-        hyperlinks: 'cache',
-        sharedStrings: 'cache',
-        styles: 'cache',
-        worksheets: 'emit',
-      });
+      const workbookReader = new ExcelJS.stream.xlsx.WorkbookReader(
+        './test.xlsx',
+        {
+          entries: 'emit',
+          hyperlinks: 'cache',
+          sharedStrings: 'cache',
+          styles: 'cache',
+          worksheets: 'emit',
+        }
+      );
 
       workbookReader.on('worksheet', worksheet =>
         worksheet.on('row', row => {
diff --git a/spec/unit/doc/workbook.spec.js b/spec/unit/doc/workbook.spec.js
index ff6a1d7d3..ffde48eab 100644
--- a/spec/unit/doc/workbook.spec.js
+++ b/spec/unit/doc/workbook.spec.js
@@ -1,4 +1,4 @@
-const simpleWorkbookModel = require('./../data/simpleWorkbook.json');
+const simpleWorkbookModel = require('../data/simpleWorkbook.json');
 const testUtils = require('../../utils/index');
 
 const Excel = verquire('exceljs');
diff --git a/spec/unit/xlsx/xform/book/defined-name-xform.spec.js b/spec/unit/xlsx/xform/book/defined-name-xform.spec.js
index 07ce3296a..27a6b10ca 100644
--- a/spec/unit/xlsx/xform/book/defined-name-xform.spec.js
+++ b/spec/unit/xlsx/xform/book/defined-name-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const DefinedNameXform = verquire('xlsx/xform/book/defined-name-xform');
 
diff --git a/spec/unit/xlsx/xform/book/workbook-calc-properties-xform.spec.js b/spec/unit/xlsx/xform/book/workbook-calc-properties-xform.spec.js
index 67e772ca2..3ee15fe38 100644
--- a/spec/unit/xlsx/xform/book/workbook-calc-properties-xform.spec.js
+++ b/spec/unit/xlsx/xform/book/workbook-calc-properties-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const WorkbookCalcPropertiesXform = verquire(
   'xlsx/xform/book/workbook-calc-properties-xform'
diff --git a/spec/unit/xlsx/xform/book/workbook-properties-xform.spec.js b/spec/unit/xlsx/xform/book/workbook-properties-xform.spec.js
index 3726ffbda..9a908134f 100644
--- a/spec/unit/xlsx/xform/book/workbook-properties-xform.spec.js
+++ b/spec/unit/xlsx/xform/book/workbook-properties-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const WorkbookPropertiesXform = verquire(
   'xlsx/xform/book/workbook-properties-xform'
diff --git a/spec/unit/xlsx/xform/book/workbook-view-xform.spec.js b/spec/unit/xlsx/xform/book/workbook-view-xform.spec.js
index 268de357a..5cd4094da 100644
--- a/spec/unit/xlsx/xform/book/workbook-view-xform.spec.js
+++ b/spec/unit/xlsx/xform/book/workbook-view-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const WorkbookViewXform = verquire('xlsx/xform/book/workbook-view-xform');
 
diff --git a/spec/unit/xlsx/xform/compy-xform.js b/spec/unit/xlsx/xform/compy-xform.js
index afbd849ee..db3e98432 100644
--- a/spec/unit/xlsx/xform/compy-xform.js
+++ b/spec/unit/xlsx/xform/compy-xform.js
@@ -1,77 +1,77 @@
-const BaseXform = verquire('xlsx/xform/base-xform');
-
-class CompyXform extends BaseXform {
-  constructor(options) {
-    super();
-
-    this.tag = options.tag;
-    this.attrs = options.attrs;
-    this.children = options.children;
-    this.map = this.children.reduce((map, child) => {
-      const name = child.name || child.tag;
-      const tag = child.tag || child.name;
-      map[tag] = child;
-      child.name = name;
-      child.tag = tag;
-      return map;
-    }, {});
-  }
-
-  prepare(model, options) {
-    this.children.forEach(child => {
-      child.xform.prepare(model[child.tag], options);
-    });
-  }
-
-  render(xmlStream, model) {
-    xmlStream.openNode(this.tag, this.attrs);
-    this.children.forEach(child => {
-      child.xform.render(xmlStream, model[child.name]);
-    });
-    xmlStream.closeNode();
-  }
-
-  parseOpen(node) {
-    if (this.parser) {
-      this.parser.xform.parseOpen(node);
-      return true;
-    }
-    switch (node.name) {
-      case this.tag:
-        this.model = {};
-        return true;
-      default:
-        this.parser = this.map[node.name];
-        if (this.parser) {
-          this.parser.xform.parseOpen(node);
-          return true;
-        }
-    }
-    return false;
-  }
-
-  parseText(text) {
-    if (this.parser) {
-      this.parser.xform.parseText(text);
-    }
-  }
-
-  parseClose(name) {
-    if (this.parser) {
-      if (!this.parser.xform.parseClose(name)) {
-        this.model[this.parser.name] = this.parser.xform.model;
-        this.parser = undefined;
-      }
-      return true;
-    }
-    return false;
-  }
-
-  reconcile(model, options) {
-    this.children.forEach(child => {
-      child.xform.prepare(model[child.tag], options);
-    });
-  }
-}
-
-module.exports = CompyXform;
+const BaseXform = verquire('xlsx/xform/base-xform');
+
+class CompyXform extends BaseXform {
+  constructor(options) {
+    super();
+
+    this.tag = options.tag;
+    this.attrs = options.attrs;
+    this.children = options.children;
+    this.map = this.children.reduce((map, child) => {
+      const name = child.name || child.tag;
+      const tag = child.tag || child.name;
+      map[tag] = child;
+      child.name = name;
+      child.tag = tag;
+      return map;
+    }, {});
+  }
+
+  prepare(model, options) {
+    this.children.forEach(child => {
+      child.xform.prepare(model[child.tag], options);
+    });
+  }
+
+  render(xmlStream, model) {
+    xmlStream.openNode(this.tag, this.attrs);
+    this.children.forEach(child => {
+      child.xform.render(xmlStream, model[child.name]);
+    });
+    xmlStream.closeNode();
+  }
+
+  parseOpen(node) {
+    if (this.parser) {
+      this.parser.xform.parseOpen(node);
+      return true;
+    }
+    switch (node.name) {
+      case this.tag:
+        this.model = {};
+        return true;
+      default:
+        this.parser = this.map[node.name];
+        if (this.parser) {
+          this.parser.xform.parseOpen(node);
+          return true;
+        }
+    }
+    return false;
+  }
+
+  parseText(text) {
+    if (this.parser) {
+      this.parser.xform.parseText(text);
+    }
+  }
+
+  parseClose(name) {
+    if (this.parser) {
+      if (!this.parser.xform.parseClose(name)) {
+        this.model[this.parser.name] = this.parser.xform.model;
+        this.parser = undefined;
+      }
+      return true;
+    }
+    return false;
+  }
+
+  reconcile(model, options) {
+    this.children.forEach(child => {
+      child.xform.prepare(model[child.tag], options);
+    });
+  }
+}
+
+module.exports = CompyXform;
diff --git a/spec/unit/xlsx/xform/core/content-types-xform.spec.js b/spec/unit/xlsx/xform/core/content-types-xform.spec.js
index 82bda44b5..29e4ea0e5 100644
--- a/spec/unit/xlsx/xform/core/content-types-xform.spec.js
+++ b/spec/unit/xlsx/xform/core/content-types-xform.spec.js
@@ -1,6 +1,6 @@
 const fs = require('fs');
 
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const ContentTypesXform = verquire('xlsx/xform/core/content-types-xform');
 
diff --git a/spec/unit/xlsx/xform/core/core-xform.spec.js b/spec/unit/xlsx/xform/core/core-xform.spec.js
index 1f2730d40..607457aae 100644
--- a/spec/unit/xlsx/xform/core/core-xform.spec.js
+++ b/spec/unit/xlsx/xform/core/core-xform.spec.js
@@ -1,6 +1,6 @@
 const fs = require('fs');
 
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const CoreXform = verquire('xlsx/xform/core/core-xform');
 
diff --git a/spec/unit/xlsx/xform/core/relationships-xform.spec.js b/spec/unit/xlsx/xform/core/relationships-xform.spec.js
index f624474fc..a967a6223 100644
--- a/spec/unit/xlsx/xform/core/relationships-xform.spec.js
+++ b/spec/unit/xlsx/xform/core/relationships-xform.spec.js
@@ -1,6 +1,6 @@
 const fs = require('fs');
 
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const RelationshipsXform = verquire('xlsx/xform/core/relationships-xform');
 
diff --git a/spec/unit/xlsx/xform/drawing/blip-fill-xform.spec.js b/spec/unit/xlsx/xform/drawing/blip-fill-xform.spec.js
index ca955f516..40def1e70 100644
--- a/spec/unit/xlsx/xform/drawing/blip-fill-xform.spec.js
+++ b/spec/unit/xlsx/xform/drawing/blip-fill-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const BlipFillXform = verquire('xlsx/xform/drawing/blip-fill-xform');
 
diff --git a/spec/unit/xlsx/xform/drawing/blip-xform.spec.js b/spec/unit/xlsx/xform/drawing/blip-xform.spec.js
index 3ce8419c0..788089ca5 100644
--- a/spec/unit/xlsx/xform/drawing/blip-xform.spec.js
+++ b/spec/unit/xlsx/xform/drawing/blip-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const BlipXform = verquire('xlsx/xform/drawing/blip-xform');
 
diff --git a/spec/unit/xlsx/xform/drawing/cell-position-xform.spec.js b/spec/unit/xlsx/xform/drawing/cell-position-xform.spec.js
index d592d7429..b278d5b0c 100644
--- a/spec/unit/xlsx/xform/drawing/cell-position-xform.spec.js
+++ b/spec/unit/xlsx/xform/drawing/cell-position-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const CellPositionXform = verquire('xlsx/xform/drawing/cell-position-xform');
 
diff --git a/spec/unit/xlsx/xform/drawing/drawing-xform.spec.js b/spec/unit/xlsx/xform/drawing/drawing-xform.spec.js
index adcc73f96..c5ee02ee1 100644
--- a/spec/unit/xlsx/xform/drawing/drawing-xform.spec.js
+++ b/spec/unit/xlsx/xform/drawing/drawing-xform.spec.js
@@ -1,6 +1,6 @@
 const fs = require('fs');
 
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const DrawingXform = verquire('xlsx/xform/drawing/drawing-xform');
 
diff --git a/spec/unit/xlsx/xform/sheet/auto-filter-xform.spec.js b/spec/unit/xlsx/xform/sheet/auto-filter-xform.spec.js
index c07cdbc7b..4fe1bd43a 100644
--- a/spec/unit/xlsx/xform/sheet/auto-filter-xform.spec.js
+++ b/spec/unit/xlsx/xform/sheet/auto-filter-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const AutoFilterXform = verquire('xlsx/xform/sheet/auto-filter-xform');
 
diff --git a/spec/unit/xlsx/xform/sheet/cell-xform.spec.js b/spec/unit/xlsx/xform/sheet/cell-xform.spec.js
index f527e947f..e5dad466c 100644
--- a/spec/unit/xlsx/xform/sheet/cell-xform.spec.js
+++ b/spec/unit/xlsx/xform/sheet/cell-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const CellXform = verquire('xlsx/xform/sheet/cell-xform');
 const SharedStringsXform = verquire('xlsx/xform/strings/shared-strings-xform');
diff --git a/spec/unit/xlsx/xform/sheet/col-xform.spec.js b/spec/unit/xlsx/xform/sheet/col-xform.spec.js
index d81d8a0c7..403de2311 100644
--- a/spec/unit/xlsx/xform/sheet/col-xform.spec.js
+++ b/spec/unit/xlsx/xform/sheet/col-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const ColXform = verquire('xlsx/xform/sheet/col-xform');
 
diff --git a/spec/unit/xlsx/xform/sheet/data-validations-xform.spec.js b/spec/unit/xlsx/xform/sheet/data-validations-xform.spec.js
index b9b2a4b33..1887b3de3 100644
--- a/spec/unit/xlsx/xform/sheet/data-validations-xform.spec.js
+++ b/spec/unit/xlsx/xform/sheet/data-validations-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const DataValidationsXform = verquire(
   'xlsx/xform/sheet/data-validations-xform'
diff --git a/spec/unit/xlsx/xform/sheet/dimension-xform.spec.js b/spec/unit/xlsx/xform/sheet/dimension-xform.spec.js
index 30f019a47..f0dd04c89 100644
--- a/spec/unit/xlsx/xform/sheet/dimension-xform.spec.js
+++ b/spec/unit/xlsx/xform/sheet/dimension-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const DimensionXform = verquire('xlsx/xform/sheet/dimension-xform');
 
diff --git a/spec/unit/xlsx/xform/sheet/header-footer-xform.spec.js b/spec/unit/xlsx/xform/sheet/header-footer-xform.spec.js
index 042ac114c..0f643cb6d 100644
--- a/spec/unit/xlsx/xform/sheet/header-footer-xform.spec.js
+++ b/spec/unit/xlsx/xform/sheet/header-footer-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const HeaderFooterXform = verquire('xlsx/xform/sheet/header-footer-xform');
 
diff --git a/spec/unit/xlsx/xform/sheet/hyperlink-xform.spec.js b/spec/unit/xlsx/xform/sheet/hyperlink-xform.spec.js
index ab1deed3b..4292dfe9d 100644
--- a/spec/unit/xlsx/xform/sheet/hyperlink-xform.spec.js
+++ b/spec/unit/xlsx/xform/sheet/hyperlink-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const HyperlinkXform = verquire('xlsx/xform/sheet/hyperlink-xform');
 
diff --git a/spec/unit/xlsx/xform/sheet/merge-cell-xform.spec.js b/spec/unit/xlsx/xform/sheet/merge-cell-xform.spec.js
index c7ecc183e..e1b62d92e 100644
--- a/spec/unit/xlsx/xform/sheet/merge-cell-xform.spec.js
+++ b/spec/unit/xlsx/xform/sheet/merge-cell-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const MergeCellXform = verquire('xlsx/xform/sheet/merge-cell-xform');
 
diff --git a/spec/unit/xlsx/xform/sheet/outline-properties-xform.spec.js b/spec/unit/xlsx/xform/sheet/outline-properties-xform.spec.js
index a2e826f4b..34c250e7b 100644
--- a/spec/unit/xlsx/xform/sheet/outline-properties-xform.spec.js
+++ b/spec/unit/xlsx/xform/sheet/outline-properties-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const OutlinePropertiesXform = verquire(
   'xlsx/xform/sheet/outline-properties-xform'
diff --git a/spec/unit/xlsx/xform/sheet/page-breaks-xform.spec.js b/spec/unit/xlsx/xform/sheet/page-breaks-xform.spec.js
index 00f16fb7d..e85e98c8d 100644
--- a/spec/unit/xlsx/xform/sheet/page-breaks-xform.spec.js
+++ b/spec/unit/xlsx/xform/sheet/page-breaks-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const PageBreaksXform = verquire('xlsx/xform/sheet/page-breaks-xform');
 
diff --git a/spec/unit/xlsx/xform/sheet/page-margins-xform.spec.js b/spec/unit/xlsx/xform/sheet/page-margins-xform.spec.js
index 867947c3d..4f560011f 100644
--- a/spec/unit/xlsx/xform/sheet/page-margins-xform.spec.js
+++ b/spec/unit/xlsx/xform/sheet/page-margins-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const PageMarginsXform = verquire('xlsx/xform/sheet/page-margins-xform');
 
diff --git a/spec/unit/xlsx/xform/sheet/page-setup-properties-xform.spec.js b/spec/unit/xlsx/xform/sheet/page-setup-properties-xform.spec.js
index 91ea3151c..ae6de07df 100644
--- a/spec/unit/xlsx/xform/sheet/page-setup-properties-xform.spec.js
+++ b/spec/unit/xlsx/xform/sheet/page-setup-properties-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const PageSetupPropertiesXform = verquire(
   'xlsx/xform/sheet/page-setup-properties-xform'
diff --git a/spec/unit/xlsx/xform/sheet/page-setup-xform.spec.js b/spec/unit/xlsx/xform/sheet/page-setup-xform.spec.js
index 32ce20520..d4e8a6a7f 100644
--- a/spec/unit/xlsx/xform/sheet/page-setup-xform.spec.js
+++ b/spec/unit/xlsx/xform/sheet/page-setup-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const PageSetupXform = verquire('xlsx/xform/sheet/page-setup-xform');
 
diff --git a/spec/unit/xlsx/xform/sheet/print-options-xform.spec.js b/spec/unit/xlsx/xform/sheet/print-options-xform.spec.js
index 238cf75d2..8f1adf7c8 100644
--- a/spec/unit/xlsx/xform/sheet/print-options-xform.spec.js
+++ b/spec/unit/xlsx/xform/sheet/print-options-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const PrintOptionsXform = verquire('xlsx/xform/sheet/print-options-xform');
 
diff --git a/spec/unit/xlsx/xform/sheet/row-xform.spec.js b/spec/unit/xlsx/xform/sheet/row-xform.spec.js
index a96f2a7fd..9b2d9cc8a 100644
--- a/spec/unit/xlsx/xform/sheet/row-xform.spec.js
+++ b/spec/unit/xlsx/xform/sheet/row-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const RowXform = verquire('xlsx/xform/sheet/row-xform');
 const SharedStringsXform = verquire('xlsx/xform/strings/shared-strings-xform');
diff --git a/spec/unit/xlsx/xform/sheet/sheet-format-properties-xform.spec.js b/spec/unit/xlsx/xform/sheet/sheet-format-properties-xform.spec.js
index 7cbbefd92..8e120bde6 100644
--- a/spec/unit/xlsx/xform/sheet/sheet-format-properties-xform.spec.js
+++ b/spec/unit/xlsx/xform/sheet/sheet-format-properties-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const SheetFormatPropertiesXform = verquire(
   'xlsx/xform/sheet/sheet-format-properties-xform'
diff --git a/spec/unit/xlsx/xform/sheet/sheet-properties-xform.spec.js b/spec/unit/xlsx/xform/sheet/sheet-properties-xform.spec.js
index 426491b85..dda10bbfe 100644
--- a/spec/unit/xlsx/xform/sheet/sheet-properties-xform.spec.js
+++ b/spec/unit/xlsx/xform/sheet/sheet-properties-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const SheetPropertiesXform = verquire(
   'xlsx/xform/sheet/sheet-properties-xform'
diff --git a/spec/unit/xlsx/xform/sheet/sheet-view-xform.spec.js b/spec/unit/xlsx/xform/sheet/sheet-view-xform.spec.js
index 27e5a8fae..188002f4e 100644
--- a/spec/unit/xlsx/xform/sheet/sheet-view-xform.spec.js
+++ b/spec/unit/xlsx/xform/sheet/sheet-view-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const SheetViewXform = verquire('xlsx/xform/sheet/sheet-view-xform');
 const ListXform = verquire('xlsx/xform/list-xform');
diff --git a/spec/unit/xlsx/xform/simple/boolean-xform.spec.js b/spec/unit/xlsx/xform/simple/boolean-xform.spec.js
index ced242fb3..e9d9d7a82 100644
--- a/spec/unit/xlsx/xform/simple/boolean-xform.spec.js
+++ b/spec/unit/xlsx/xform/simple/boolean-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const BooleanXform = verquire('xlsx/xform/simple/boolean-xform');
 
diff --git a/spec/unit/xlsx/xform/simple/date-xform.spec.js b/spec/unit/xlsx/xform/simple/date-xform.spec.js
index 986934702..a5c737010 100644
--- a/spec/unit/xlsx/xform/simple/date-xform.spec.js
+++ b/spec/unit/xlsx/xform/simple/date-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const DateXform = verquire('xlsx/xform/simple/date-xform');
 
diff --git a/spec/unit/xlsx/xform/simple/float-xform.spec.js b/spec/unit/xlsx/xform/simple/float-xform.spec.js
index 4cca1a3d8..e8a5c19c0 100644
--- a/spec/unit/xlsx/xform/simple/float-xform.spec.js
+++ b/spec/unit/xlsx/xform/simple/float-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const FloatXform = verquire('xlsx/xform/simple/float-xform');
 
diff --git a/spec/unit/xlsx/xform/simple/integer-xform.spec.js b/spec/unit/xlsx/xform/simple/integer-xform.spec.js
index 83d4db447..d5e920b76 100644
--- a/spec/unit/xlsx/xform/simple/integer-xform.spec.js
+++ b/spec/unit/xlsx/xform/simple/integer-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const IntegerXform = verquire('xlsx/xform/simple/integer-xform');
 
diff --git a/spec/unit/xlsx/xform/simple/string-xform.spec.js b/spec/unit/xlsx/xform/simple/string-xform.spec.js
index 2d83c64f7..a276fffdf 100644
--- a/spec/unit/xlsx/xform/simple/string-xform.spec.js
+++ b/spec/unit/xlsx/xform/simple/string-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const StringXform = verquire('xlsx/xform/simple/string-xform');
 
diff --git a/spec/unit/xlsx/xform/strings/phonetic-text-xform.spec.js b/spec/unit/xlsx/xform/strings/phonetic-text-xform.spec.js
index a30b68e35..1077d35ac 100644
--- a/spec/unit/xlsx/xform/strings/phonetic-text-xform.spec.js
+++ b/spec/unit/xlsx/xform/strings/phonetic-text-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const PhoneticTextXform = verquire('xlsx/xform/strings/phonetic-text-xform');
 
diff --git a/spec/unit/xlsx/xform/style/alignment-xform.spec.js b/spec/unit/xlsx/xform/style/alignment-xform.spec.js
index 80e68738b..12f8d04dd 100644
--- a/spec/unit/xlsx/xform/style/alignment-xform.spec.js
+++ b/spec/unit/xlsx/xform/style/alignment-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const AlignmentXform = verquire('xlsx/xform/style/alignment-xform');
 
diff --git a/spec/unit/xlsx/xform/style/border-xform.spec.js b/spec/unit/xlsx/xform/style/border-xform.spec.js
index eb2c4da05..40f8b5162 100644
--- a/spec/unit/xlsx/xform/style/border-xform.spec.js
+++ b/spec/unit/xlsx/xform/style/border-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const BorderXform = verquire('xlsx/xform/style/border-xform');
 
diff --git a/spec/unit/xlsx/xform/style/color-xform.spec.js b/spec/unit/xlsx/xform/style/color-xform.spec.js
index 4dbde6289..445781d50 100644
--- a/spec/unit/xlsx/xform/style/color-xform.spec.js
+++ b/spec/unit/xlsx/xform/style/color-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const ColorXform = verquire('xlsx/xform/style/color-xform');
 
diff --git a/spec/unit/xlsx/xform/style/fill-xform.spec.js b/spec/unit/xlsx/xform/style/fill-xform.spec.js
index bcf7a2773..ddc92bb10 100644
--- a/spec/unit/xlsx/xform/style/fill-xform.spec.js
+++ b/spec/unit/xlsx/xform/style/fill-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const FillXform = verquire('xlsx/xform/style/fill-xform');
 
diff --git a/spec/unit/xlsx/xform/style/font-xform.spec.js b/spec/unit/xlsx/xform/style/font-xform.spec.js
index bb8dfa04f..dc6be0d6c 100644
--- a/spec/unit/xlsx/xform/style/font-xform.spec.js
+++ b/spec/unit/xlsx/xform/style/font-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const FontXform = verquire('xlsx/xform/style/font-xform');
 
diff --git a/spec/unit/xlsx/xform/style/numfmt-xform.spec.js b/spec/unit/xlsx/xform/style/numfmt-xform.spec.js
index 0964ffa36..cd2856918 100644
--- a/spec/unit/xlsx/xform/style/numfmt-xform.spec.js
+++ b/spec/unit/xlsx/xform/style/numfmt-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const NumFmtXform = verquire('xlsx/xform/style/numfmt-xform');
 
diff --git a/spec/unit/xlsx/xform/style/styles-xform.spec.js b/spec/unit/xlsx/xform/style/styles-xform.spec.js
index 5c5925a27..d8e97cc45 100644
--- a/spec/unit/xlsx/xform/style/styles-xform.spec.js
+++ b/spec/unit/xlsx/xform/style/styles-xform.spec.js
@@ -1,6 +1,6 @@
 const fs = require('fs');
 
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const StylesXform = verquire('xlsx/xform/style/styles-xform');
 const XmlStream = verquire('utils/xml-stream');
diff --git a/spec/unit/xlsx/xform/style/underline-xform.spec.js b/spec/unit/xlsx/xform/style/underline-xform.spec.js
index 944fc571b..30e8afa15 100644
--- a/spec/unit/xlsx/xform/style/underline-xform.spec.js
+++ b/spec/unit/xlsx/xform/style/underline-xform.spec.js
@@ -1,4 +1,4 @@
-const testXformHelper = require('./../test-xform-helper');
+const testXformHelper = require('../test-xform-helper');
 
 const UnderlineXform = verquire('xlsx/xform/style/underline-xform');
 
diff --git a/spec/unit/xlsx/xform/table/auto-filter-xform.spec.js b/spec/unit/xlsx/xform/table/auto-filter-xform.spec.js
index 502fd86d6..77de89999 100644
--- a/spec/unit/xlsx/xform/table/auto-filter-xform.spec.js
+++ b/spec/unit/xlsx/xform/table/auto-filter-xform.spec.js
@@ -1,42 +1,42 @@
-const testXformHelper = require('./../test-xform-helper');
-
-const AutoFilterXform = verquire('xlsx/xform/table/auto-filter-xform');
-
-const expectations = [
-  {
-    title: 'showing filter',
-    create() {
-      return new AutoFilterXform();
-    },
-    initialModel: {
-      autoFilterRef: 'A1:B10',
-      columns: [
-        {filterButton: false},
-        {filterButton: true},
-        {filterButton: true},
-      ],
-    },
-    preparedModel: {
-      autoFilterRef: 'A1:B10',
-      columns: [
-        {colId: '0', filterButton: false},
-        {colId: '1', filterButton: true},
-        {colId: '2', filterButton: true},
-      ],
-    },
-    xml:
-      '<autoFilter ref="A1:B10">' +
-      '<filterColumn colId="0" hiddenButton="1" />' +
-      '<filterColumn colId="1" hiddenButton="0" />' +
-      '<filterColumn colId="2" hiddenButton="0" />' +
-      '</autoFilter>',
-    get parsedModel() {
-      return this.initialModel;
-    },
-    tests: ['prepare', 'render', 'renderIn', 'parse'],
-  },
-];
-
-describe('AutoFilterXform', () => {
-  testXformHelper(expectations);
-});
+const testXformHelper = require('../test-xform-helper');
+
+const AutoFilterXform = verquire('xlsx/xform/table/auto-filter-xform');
+
+const expectations = [
+  {
+    title: 'showing filter',
+    create() {
+      return new AutoFilterXform();
+    },
+    initialModel: {
+      autoFilterRef: 'A1:B10',
+      columns: [
+        {filterButton: false},
+        {filterButton: true},
+        {filterButton: true},
+      ],
+    },
+    preparedModel: {
+      autoFilterRef: 'A1:B10',
+      columns: [
+        {colId: '0', filterButton: false},
+        {colId: '1', filterButton: true},
+        {colId: '2', filterButton: true},
+      ],
+    },
+    xml:
+      '<autoFilter ref="A1:B10">' +
+      '<filterColumn colId="0" hiddenButton="1" />' +
+      '<filterColumn colId="1" hiddenButton="0" />' +
+      '<filterColumn colId="2" hiddenButton="0" />' +
+      '</autoFilter>',
+    get parsedModel() {
+      return this.initialModel;
+    },
+    tests: ['prepare', 'render', 'renderIn', 'parse'],
+  },
+];
+
+describe('AutoFilterXform', () => {
+  testXformHelper(expectations);
+});
diff --git a/spec/unit/xlsx/xform/table/filter-column-xform.spec.js b/spec/unit/xlsx/xform/table/filter-column-xform.spec.js
index 669cf084f..2d9900c17 100644
--- a/spec/unit/xlsx/xform/table/filter-column-xform.spec.js
+++ b/spec/unit/xlsx/xform/table/filter-column-xform.spec.js
@@ -1,38 +1,38 @@
-const testXformHelper = require('./../test-xform-helper');
-
-const FilterColumnXform = verquire('xlsx/xform/table/filter-column-xform');
-
-const expectations = [
-  {
-    title: 'showing filter',
-    create() {
-      return new FilterColumnXform();
-    },
-    initialModel: {filterButton: true},
-    preparedModel: {colId: '0', filterButton: true},
-    xml: '<filterColumn colId="0" hiddenButton="0" />',
-    get parsedModel() {
-      return this.initialModel;
-    },
-    tests: ['prepare', 'render', 'renderIn', 'parse'],
-    options: {index: 0},
-  },
-  {
-    title: 'hidden filter',
-    create() {
-      return new FilterColumnXform();
-    },
-    initialModel: {filterButton: false},
-    preparedModel: {colId: '1', filterButton: false},
-    xml: '<filterColumn colId="1" hiddenButton="1" />',
-    get parsedModel() {
-      return this.initialModel;
-    },
-    tests: ['prepare', 'render', 'renderIn', 'parse'],
-    options: {index: 1},
-  },
-];
-
-describe('FilterColumnXform', () => {
-  testXformHelper(expectations);
-});
+const testXformHelper = require('../test-xform-helper');
+
+const FilterColumnXform = verquire('xlsx/xform/table/filter-column-xform');
+
+const expectations = [
+  {
+    title: 'showing filter',
+    create() {
+      return new FilterColumnXform();
+    },
+    initialModel: {filterButton: true},
+    preparedModel: {colId: '0', filterButton: true},
+    xml: '<filterColumn colId="0" hiddenButton="0" />',
+    get parsedModel() {
+      return this.initialModel;
+    },
+    tests: ['prepare', 'render', 'renderIn', 'parse'],
+    options: {index: 0},
+  },
+  {
+    title: 'hidden filter',
+    create() {
+      return new FilterColumnXform();
+    },
+    initialModel: {filterButton: false},
+    preparedModel: {colId: '1', filterButton: false},
+    xml: '<filterColumn colId="1" hiddenButton="1" />',
+    get parsedModel() {
+      return this.initialModel;
+    },
+    tests: ['prepare', 'render', 'renderIn', 'parse'],
+    options: {index: 1},
+  },
+];
+
+describe('FilterColumnXform', () => {
+  testXformHelper(expectations);
+});
diff --git a/spec/unit/xlsx/xform/table/table-column-xform.spec.js b/spec/unit/xlsx/xform/table/table-column-xform.spec.js
index b648299cc..109486e96 100644
--- a/spec/unit/xlsx/xform/table/table-column-xform.spec.js
+++ b/spec/unit/xlsx/xform/table/table-column-xform.spec.js
@@ -1,30 +1,30 @@
-const testXformHelper = require('./../test-xform-helper');
-
-const TableColumnXform = verquire('xlsx/xform/table/table-column-xform');
-
-const expectations = [
-  {
-    title: 'label',
-    create() {
-      return new TableColumnXform();
-    },
-    preparedModel: {id: 1, name: 'Foo', totalsRowLabel: 'Bar'},
-    xml: '<tableColumn id="1" name="Foo" totalsRowLabel="Bar" />',
-    parsedModel: {name: 'Foo', totalsRowLabel: 'Bar'},
-    tests: ['render', 'renderIn', 'parse'],
-  },
-  {
-    title: 'function',
-    create() {
-      return new TableColumnXform();
-    },
-    preparedModel: {id: 1, name: 'Foo', totalsRowFunction: 'Baz'},
-    xml: '<tableColumn id="1" name="Foo" totalsRowFunction="Baz" />',
-    parsedModel: {name: 'Foo', totalsRowFunction: 'Baz'},
-    tests: ['render', 'renderIn', 'parse'],
-  },
-];
-
-describe('TableColumnXform', () => {
-  testXformHelper(expectations);
-});
+const testXformHelper = require('../test-xform-helper');
+
+const TableColumnXform = verquire('xlsx/xform/table/table-column-xform');
+
+const expectations = [
+  {
+    title: 'label',
+    create() {
+      return new TableColumnXform();
+    },
+    preparedModel: {id: 1, name: 'Foo', totalsRowLabel: 'Bar'},
+    xml: '<tableColumn id="1" name="Foo" totalsRowLabel="Bar" />',
+    parsedModel: {name: 'Foo', totalsRowLabel: 'Bar'},
+    tests: ['render', 'renderIn', 'parse'],
+  },
+  {
+    title: 'function',
+    create() {
+      return new TableColumnXform();
+    },
+    preparedModel: {id: 1, name: 'Foo', totalsRowFunction: 'Baz'},
+    xml: '<tableColumn id="1" name="Foo" totalsRowFunction="Baz" />',
+    parsedModel: {name: 'Foo', totalsRowFunction: 'Baz'},
+    tests: ['render', 'renderIn', 'parse'],
+  },
+];
+
+describe('TableColumnXform', () => {
+  testXformHelper(expectations);
+});
diff --git a/spec/unit/xlsx/xform/table/table-style-info-xform.spec.js b/spec/unit/xlsx/xform/table/table-style-info-xform.spec.js
index b0cc2aa74..5ce442bae 100644
--- a/spec/unit/xlsx/xform/table/table-style-info-xform.spec.js
+++ b/spec/unit/xlsx/xform/table/table-style-info-xform.spec.js
@@ -1,48 +1,48 @@
-const testXformHelper = require('./../test-xform-helper');
-
-const TableStyleInfoXform = verquire('xlsx/xform/table/table-style-info-xform');
-
-const expectations = [
-  {
-    title: 'row',
-    create() {
-      return new TableStyleInfoXform();
-    },
-    preparedModel: {
-      theme: 'TableStyle',
-      showFirstColumn: false,
-      showLastColumn: false,
-      showRowStripes: true,
-      showColumnStripes: false,
-    },
-    xml:
-      '<tableStyleInfo name="TableStyle" showFirstColumn="0" showLastColumn="0" showRowStripes="1" showColumnStripes="0" />',
-    get parsedModel() {
-      return this.preparedModel;
-    },
-    tests: ['render', 'renderIn', 'parse'],
-  },
-  {
-    title: 'col',
-    create() {
-      return new TableStyleInfoXform();
-    },
-    preparedModel: {
-      theme: null,
-      showFirstColumn: true,
-      showLastColumn: true,
-      showRowStripes: false,
-      showColumnStripes: true,
-    },
-    xml:
-      '<tableStyleInfo showFirstColumn="1" showLastColumn="1" showRowStripes="0" showColumnStripes="1" />',
-    get parsedModel() {
-      return this.preparedModel;
-    },
-    tests: ['render', 'renderIn', 'parse'],
-  },
-];
-
-describe('TableStyleInfoXform', () => {
-  testXformHelper(expectations);
-});
+const testXformHelper = require('../test-xform-helper');
+
+const TableStyleInfoXform = verquire('xlsx/xform/table/table-style-info-xform');
+
+const expectations = [
+  {
+    title: 'row',
+    create() {
+      return new TableStyleInfoXform();
+    },
+    preparedModel: {
+      theme: 'TableStyle',
+      showFirstColumn: false,
+      showLastColumn: false,
+      showRowStripes: true,
+      showColumnStripes: false,
+    },
+    xml:
+      '<tableStyleInfo name="TableStyle" showFirstColumn="0" showLastColumn="0" showRowStripes="1" showColumnStripes="0" />',
+    get parsedModel() {
+      return this.preparedModel;
+    },
+    tests: ['render', 'renderIn', 'parse'],
+  },
+  {
+    title: 'col',
+    create() {
+      return new TableStyleInfoXform();
+    },
+    preparedModel: {
+      theme: null,
+      showFirstColumn: true,
+      showLastColumn: true,
+      showRowStripes: false,
+      showColumnStripes: true,
+    },
+    xml:
+      '<tableStyleInfo showFirstColumn="1" showLastColumn="1" showRowStripes="0" showColumnStripes="1" />',
+    get parsedModel() {
+      return this.preparedModel;
+    },
+    tests: ['render', 'renderIn', 'parse'],
+  },
+];
+
+describe('TableStyleInfoXform', () => {
+  testXformHelper(expectations);
+});
diff --git a/spec/unit/xlsx/xform/table/table-xform.spec.js b/spec/unit/xlsx/xform/table/table-xform.spec.js
index 71c6ef48e..098a9bb94 100644
--- a/spec/unit/xlsx/xform/table/table-xform.spec.js
+++ b/spec/unit/xlsx/xform/table/table-xform.spec.js
@@ -1,23 +1,23 @@
-const fs = require('fs');
-
-const testXformHelper = require('./../test-xform-helper');
-
-const TableXform = verquire('xlsx/xform/table/table-xform');
-
-const expectations = [
-  {
-    title: 'showing filter',
-    create() {
-      return new TableXform();
-    },
-    initialModel: null,
-    preparedModel: require('./data/table.1.1'),
-    xml: fs.readFileSync(`${__dirname}/data/table.1.2.xml`).toString(),
-    parsedModel: require('./data/table.1.3'),
-    tests: ['render', 'renderIn', 'parse'],
-  },
-];
-
-describe('TableXform', () => {
-  testXformHelper(expectations);
-});
+const fs = require('fs');
+
+const testXformHelper = require('../test-xform-helper');
+
+const TableXform = verquire('xlsx/xform/table/table-xform');
+
+const expectations = [
+  {
+    title: 'showing filter',
+    create() {
+      return new TableXform();
+    },
+    initialModel: null,
+    preparedModel: require('./data/table.1.1'),
+    xml: fs.readFileSync(`${__dirname}/data/table.1.2.xml`).toString(),
+    parsedModel: require('./data/table.1.3'),
+    tests: ['render', 'renderIn', 'parse'],
+  },
+];
+
+describe('TableXform', () => {
+  testXformHelper(expectations);
+});

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