diff --git a/pom.xml b/pom.xml
index 80cc93a..6b265be 100644
--- a/pom.xml
+++ b/pom.xml
@@ -10,6 +10,20 @@
     <version>0.1.2</version>
   </parent>
 
+  <dependencies>
+    <dependency>
+      <groupId>org.clojure</groupId>
+      <artifactId>clojure</artifactId>
+      <version>1.7.0</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.clojure</groupId>
+      <artifactId>tools.reader</artifactId>
+      <version>0.10.0-alpha1</version>
+    </dependency>
+  </dependencies>
+
   <properties>
     <clojure.warnOnReflection>true</clojure.warnOnReflection>
   </properties>
@@ -26,4 +40,5 @@
     <url>git@github.com:clojure/tools.namespace.git</url>
     <tag>HEAD</tag>
   </scm>
+
 </project>
diff --git a/src/main/clojure/clojure/tools/namespace/dependency.clj b/src/main/clojure/clojure/tools/namespace/dependency.cljc
similarity index 97%
rename from src/main/clojure/clojure/tools/namespace/dependency.clj
rename to src/main/clojure/clojure/tools/namespace/dependency.cljc
index 96a5e9e..3c6b54a 100644
--- a/src/main/clojure/clojure/tools/namespace/dependency.clj
+++ b/src/main/clojure/clojure/tools/namespace/dependency.cljc
@@ -142,6 +142,10 @@
                (remove-node g' node)
                (clojure.set/union (set more) (set add)))))))
 
+(def ^:private max-number
+  #?(:clj Long/MAX_VALUE
+     :cljs js/Number.MAX_VALUE))
+
 (defn topo-comparator
   "Returns a comparator fn which produces a topological sort based on
   the dependencies in graph. Nodes not present in the graph will sort
@@ -149,6 +153,5 @@
   [graph]
   (let [pos (zipmap (topo-sort graph) (range))]
     (fn [a b]
-      (compare (get pos a Long/MAX_VALUE)
-               (get pos b Long/MAX_VALUE)))))
-
+      (compare (get pos a max-number)
+               (get pos b max-number)))))
diff --git a/src/main/clojure/clojure/tools/namespace/parse.clj b/src/main/clojure/clojure/tools/namespace/parse.cljc
similarity index 63%
rename from src/main/clojure/clojure/tools/namespace/parse.clj
rename to src/main/clojure/clojure/tools/namespace/parse.cljc
index 78a8fc0..846981b 100644
--- a/src/main/clojure/clojure/tools/namespace/parse.clj
+++ b/src/main/clojure/clojure/tools/namespace/parse.cljc
@@ -10,24 +10,9 @@
       :doc "Parse Clojure namespace (ns) declarations and extract
   dependencies."}
   clojure.tools.namespace.parse
-  (:require [clojure.set :as set]))
-
-(defn- read-clj
-  "Calls clojure.core/read. If reader conditionals are
-  supported (Clojure 1.7) then adds options {:read-cond :allow}."
-  [rdr]
-  (if (resolve 'clojure.core/reader-conditional?)
-    (read {:read-cond :allow} rdr)
-    (read rdr)))
-
-(defn- force-errors
-  "Forces reader errors to be thrown immediately. Some versions of
-  Clojure accept invalid forms in the reader and only throw an
-  exception when they are printed.
-  See http://dev.clojure.org/jira/browse/TNS-1"
-  [form]
-  (str form) ; str forces errors
-  form)
+  (:require #?(:clj [clojure.tools.reader :as reader]
+               :cljs [cljs.tools.reader :as reader])
+            [clojure.set :as set]))
 
 (defn comment?
   "Returns true if form is a (comment ...)"
@@ -40,21 +25,23 @@
   (and (list? form) (= 'ns (first form))))
 
 (defn read-ns-decl
-  "Attempts to read a (ns ...) declaration from a
-  java.io.PushbackReader, and returns the unevaluated form. Returns
-  the first top-level ns form found. Returns nil if read fails or if a
-  ns declaration cannot be found. Note that read can execute code
-  (controlled by *read-eval*), and as such should be used only with
-  trusted sources."
-  [rdr]
-  {:pre [(instance? java.io.PushbackReader rdr)]}
-  (try
+  "Attempts to read a (ns ...) declaration from a reader, and returns
+  the unevaluated form. Returns the first top-level ns form found.
+  Returns nil if a ns declaration cannot be found. Note that read can
+  execute code (controlled by tools.reader/*read-eval*), and as such
+  should be used only with trusted sources. read-opts is passed
+  through to tools.reader/read, defaults to allow conditional reader
+  expressions with :clj"
+  ([rdr]
+   (read-ns-decl rdr {:read-cond :allow
+                      :features #{:clj}}))
+  ([rdr read-opts]
    (loop []
-     (let [form (force-errors (read-clj rdr))]
-       (if (ns-decl? form)
-         form
-         (recur))))
-   (catch Exception e nil)))
+     (let [form (reader/read (assoc read-opts :eof ::eof) rdr)]
+       (cond
+         (ns-decl? form) form
+         (= ::eof form) nil
+         :else (recur))))))
 
 ;;; Parsing dependencies
 
@@ -91,12 +78,25 @@
 	(keyword? form)  ; Some people write (:require ... :reload-all)
           nil
 	:else
-          (throw (IllegalArgumentException.
-                  (pr-str "Unparsable namespace form:" form)))))
+          (throw (ex-info "Unparsable namespace form"
+                          {:reason ::unparsable-ns-form
+                           :form form}))))
+
+(def ^:private ns-clause-head-names
+  "Set of symbol/keyword names which can appear as the head of a
+  clause in the ns form."
+  #{"use" "require" "use-macros" "require-macros"})
+
+(def ^:private ns-clause-heads
+  "Set of all symbols and keywords which can appear at the head of a
+  dependency clause in the ns form."
+  (set (mapcat (fn [name] (list (keyword name)
+                                (symbol name)))
+               ns-clause-head-names)))
 
 (defn- deps-from-ns-form [form]
   (when (and (sequential? form)  ; should be list but sometimes is not
-	     (contains? #{:use :require 'use 'require} (first form)))
+	     (contains? ns-clause-heads (first form)))
     (mapcat #(deps-from-libspec nil %) (rest form))))
 
 (defn deps-from-ns-decl
diff --git a/src/main/clojure/clojure/tools/namespace/track.clj b/src/main/clojure/clojure/tools/namespace/track.cljc
similarity index 100%
rename from src/main/clojure/clojure/tools/namespace/track.clj
rename to src/main/clojure/clojure/tools/namespace/track.cljc

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