diff --git a/CHANGELOG.md b/CHANGELOG.md
index ef0188bc..5b727634 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,7 +13,22 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ### Fixed
 
-## [v4.0.0a0] - 2025-04-17
+## [v4.0.0a1] - 2925-04-17
+
+### Changed
+- Updated package names in setup.py files to use underscores instead of periods for PEP 625 compliance [#358](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/358)
+  - Changed `stac_fastapi.opensearch` to `stac_fastapi_opensearch`
+  - Changed `stac_fastapi.elasticsearch` to `stac_fastapi_elasticsearch`
+  - Changed `stac_fastapi.core` to `stac_fastapi_core`
+  - Updated all related dependencies to use the new naming convention
+- Renamed `docker-compose.yml` to `compose.yml` to align with Docker Compose V2 conventions [#358](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/358)
+- Removed deprecated `version` field from all compose files [#358](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/358)
+- Updated `STAC_FASTAPI_VERSION` environment variables to 4.0.0a1 in all compose files [#358](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/358)
+- Bumped version from 4.0.0a0 to 4.0.0a1 for the PEP 625 compliant release [#358](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/358)
+- Updated dependency requirements to use compatible release specifiers (~=) for more controlled updates while allowing for bug fixes and security patches [#358](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/issues/358)
+- Removed elasticsearch-dsl dependency as it's now part of the elasticsearch package since version 8.18.0 [#358](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/issues/358)
+
+## [v4.0.0a0] - 2025-04-16
 
 ### Added
 - Added support for dynamically-generated queryables based on Elasticsearch/OpenSearch mappings, with extensible metadata augmentation [#351](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/351)
@@ -328,7 +343,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Use genexp in execute_search and get_all_collections to return results.
 - Added db_to_stac serializer to item_collection method in core.py.
 
-[Unreleased]: https://github.com/stac-utils/stac-fastapi-elasticsearch/tree/v4.0.0a0...main
+[Unreleased]: https://github.com/stac-utils/stac-fastapi-elasticsearch/tree/v4.0.0a1...main
+[v4.0.0a1]: https://github.com/stac-utils/stac-fastapi-elasticsearch/tree/v4.0.0a0...v4.0.0a1
 [v4.0.0a0]: https://github.com/stac-utils/stac-fastapi-elasticsearch/tree/v3.2.5...v4.0.0a0
 [v3.2.5]: https://github.com/stac-utils/stac-fastapi-elasticsearch/tree/v3.2.4...v3.2.5
 [v3.2.4]: https://github.com/stac-utils/stac-fastapi-elasticsearch/tree/v3.2.3...v3.2.4
diff --git a/Makefile b/Makefile
index e965d785..a16fe6d9 100644
--- a/Makefile
+++ b/Makefile
@@ -107,10 +107,10 @@ install-os: pybase-install
 
 .PHONY: docs-image
 docs-image:
-	docker compose -f docker compose.docs.yml \
+	docker compose -f compose.docs.yml \
 		build
 
 .PHONY: docs
 docs: docs-image
-	docker compose -f docker compose.docs.yml \
+	docker compose -f compose.docs.yml \
 		run docs
\ No newline at end of file
diff --git a/README.md b/README.md
index 84c38d12..d6e648f3 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@
 </p>
 
   
-  [![PyPI version](https://badge.fury.io/py/stac-fastapi.elasticsearch.svg)](https://badge.fury.io/py/stac-fastapi.elasticsearch)
+  [![PyPI version](https://badge.fury.io/py/stac-fastapi-elasticsearch.svg)](https://badge.fury.io/py/stac-fastapi-elasticsearch) [![PyPI version](https://badge.fury.io/py/stac-fastapi-opensearch.svg)](https://badge.fury.io/py/stac-fastapi-opensearch)
   [![Join the chat at https://gitter.im/stac-fastapi-elasticsearch/community](https://badges.gitter.im/stac-fastapi-elasticsearch/community.svg)](https://gitter.im/stac-fastapi-elasticsearch/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 
@@ -26,7 +26,7 @@
   
 - Our Api core library can be used to create custom backends. See [stac-fastapi-mongo](https://github.com/Healy-Hyperspatial/stac-fastapi-mongo) for a working example.
 - Reach out on our [Gitter](https://app.gitter.im/#/room/#stac-fastapi-elasticsearch_community:gitter.im) channel or feel free to add to our [Discussions](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/discussions) page here on github.
-- There is [Postman](https://documenter.getpostman.com/view/12888943/2s8ZDSdRHA) documentation here for examples on how to run some of the API routes locally - after starting the elasticsearch backend via the docker-compose.yml file.
+- There is [Postman](https://documenter.getpostman.com/view/12888943/2s8ZDSdRHA) documentation here for examples on how to run some of the API routes locally - after starting the elasticsearch backend via the compose.yml file.
 - The `/examples` folder shows an example of running stac-fastapi-elasticsearch from PyPI in docker without needing any code from the repository. There is also a Postman collection here that you can load into Postman for testing the API routes.
 
 - For changes, see the [Changelog](CHANGELOG.md)
@@ -35,14 +35,20 @@
 
 ### To install from PyPI:
 
-```shell
-pip install stac_fastapi.elasticsearch
-```
-or
-```
-pip install stac_fastapi.opensearch
+```bash
+# For versions 4.0.0a1 and newer (PEP 625 compliant naming):
+pip install stac-fastapi-elasticsearch  # Elasticsearch backend
+pip install stac-fastapi-opensearch    # Opensearch backend
+pip install stac-fastapi-core          # Core library
+
+# For versions 4.0.0a0 and older:
+pip install stac-fastapi.elasticsearch  # Elasticsearch backend
+pip install stac-fastapi.opensearch    # Opensearch backend
+pip install stac-fastapi.core          # Core library
 ```
 
+> **Important Note:** Starting with version 4.0.0a1, package names have changed from using periods (e.g., `stac-fastapi.core`) to using hyphens (e.g., `stac-fastapi-core`) to comply with PEP 625. The internal package structure uses underscores, but users should install with hyphens as shown above. Please update your requirements files accordingly.
+
 ### To install and run via pre-built Docker Images
 
 We provide ready-to-use Docker images through GitHub Container Registry ([ElasticSearch](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pkgs/container/stac-fastapi-es) and [OpenSearch](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pkgs/container/stac-fastapi-os) backends). You can easily pull and run these images:
@@ -57,15 +63,15 @@ docker pull ghcr.io/stac-utils/stac-fastapi-os:latest
 
 ## Run Elasticsearch API backend on localhost:8080
 
-You need to ensure [**Docker Compose**](https://docs.docker.com/compose/install/) or [**Podman Compose**](https://podman-desktop.io/docs/compose) installed and running on your machine. In the follwoing command instead of `docker-compose` you can use `podman-compose` as well.
+You need to ensure [**Docker Compose**](https://docs.docker.com/compose/install/) or [**Podman Compose**](https://podman-desktop.io/docs/compose) installed and running on your machine. In the following command instead of `docker compose` you can use `podman-compose` as well.
 
 ```shell
-docker-compose up elasticsearch app-elasticsearch
+docker compose up elasticsearch app-elasticsearch
 ```
 
-By default, docker-compose uses Elasticsearch 8.x and OpenSearch 2.11.1.
+By default, Docker Compose uses Elasticsearch 8.x and OpenSearch 2.11.1.
 If you wish to use a different version, put the following in a 
-file named `.env` in the same directory you run docker-compose from:
+file named `.env` in the same directory you run Docker Compose from:
 
 ```shell
 ELASTICSEARCH_VERSION=7.17.1
@@ -165,7 +171,7 @@ These templates will be used implicitly when creating new Collection and Item in
 This section covers how to create a snapshot repository and then create and restore snapshots with this.
 
 Create a snapshot repository. This puts the files in the `elasticsearch/snapshots` in this git repo clone, as
-the elasticsearch.yml and docker-compose files create a mapping from that directory to 
+the elasticsearch.yml and compose files create a mapping from that directory to 
 `/usr/share/elasticsearch/snapshots` within the Elasticsearch container and grant permissions on using it.
 
 ```shell
diff --git a/docker-compose.docs.yml b/compose.docs.yml
similarity index 94%
rename from docker-compose.docs.yml
rename to compose.docs.yml
index 4d91a06b..49573fbf 100644
--- a/docker-compose.docs.yml
+++ b/compose.docs.yml
@@ -1,5 +1,3 @@
-version: '3'
-
 services:
   docs:
     container_name: stac-fastapi-docs-dev
diff --git a/docker-compose.yml b/compose.yml
similarity index 97%
rename from docker-compose.yml
rename to compose.yml
index 8ec0701b..a66e584f 100644
--- a/docker-compose.yml
+++ b/compose.yml
@@ -9,7 +9,7 @@ services:
     environment:
       - STAC_FASTAPI_TITLE=stac-fastapi-elasticsearch
       - STAC_FASTAPI_DESCRIPTION=A STAC FastAPI with an Elasticsearch backend
-      - STAC_FASTAPI_VERSION=2.1
+      - STAC_FASTAPI_VERSION=4.0.0a1
       - APP_HOST=0.0.0.0
       - APP_PORT=8080
       - RELOAD=true
@@ -41,7 +41,7 @@ services:
     environment:
       - STAC_FASTAPI_TITLE=stac-fastapi-opensearch
       - STAC_FASTAPI_DESCRIPTION=A STAC FastAPI with an Opensearch backend
-      - STAC_FASTAPI_VERSION=3.0.0a2
+      - STAC_FASTAPI_VERSION=4.0.0a1
       - APP_HOST=0.0.0.0
       - APP_PORT=8082
       - RELOAD=true
diff --git a/examples/auth/docker-compose.basic_auth.yml b/examples/auth/compose.basic_auth.yml
similarity index 98%
rename from examples/auth/docker-compose.basic_auth.yml
rename to examples/auth/compose.basic_auth.yml
index a6292a1f..c3e069ec 100644
--- a/examples/auth/docker-compose.basic_auth.yml
+++ b/examples/auth/compose.basic_auth.yml
@@ -1,5 +1,3 @@
-version: '3.9'
-
 services:
   app-elasticsearch:
     container_name: stac-fastapi-es
@@ -11,7 +9,7 @@ services:
     environment:
       - STAC_FASTAPI_TITLE=stac-fastapi-elasticsearch
       - STAC_FASTAPI_DESCRIPTION=A STAC FastAPI with an Elasticsearch backend
-      - STAC_FASTAPI_VERSION=3.0.0a2
+      - STAC_FASTAPI_VERSION=4.0.0a1
       - APP_HOST=0.0.0.0
       - APP_PORT=8080
       - RELOAD=true
@@ -44,7 +42,7 @@ services:
     environment:
       - STAC_FASTAPI_TITLE=stac-fastapi-opensearch
       - STAC_FASTAPI_DESCRIPTION=A STAC FastAPI with an Opensearch backend
-      - STAC_FASTAPI_VERSION=2.1
+      - STAC_FASTAPI_VERSION=4.0.0a1
       - APP_HOST=0.0.0.0
       - APP_PORT=8082
       - RELOAD=true
diff --git a/examples/auth/docker-compose.oauth2.yml b/examples/auth/compose.oauth2.yml
similarity index 97%
rename from examples/auth/docker-compose.oauth2.yml
rename to examples/auth/compose.oauth2.yml
index 8cd8f72f..ccd3bb1f 100644
--- a/examples/auth/docker-compose.oauth2.yml
+++ b/examples/auth/compose.oauth2.yml
@@ -1,5 +1,3 @@
-version: '3.9'
-
 services:
   app-elasticsearch:
     container_name: stac-fastapi-es
@@ -11,7 +9,7 @@ services:
     environment:
       - STAC_FASTAPI_TITLE=stac-fastapi-elasticsearch
       - STAC_FASTAPI_DESCRIPTION=A STAC FastAPI with an Elasticsearch backend
-      - STAC_FASTAPI_VERSION=3.0.0a1
+      - STAC_FASTAPI_VERSION=4.0.0a1
       - APP_HOST=0.0.0.0
       - APP_PORT=8080
       - RELOAD=true
@@ -45,7 +43,7 @@ services:
     environment:
       - STAC_FASTAPI_TITLE=stac-fastapi-opensearch
       - STAC_FASTAPI_DESCRIPTION=A STAC FastAPI with an Opensearch backend
-      - STAC_FASTAPI_VERSION=2.1
+      - STAC_FASTAPI_VERSION=4.0.0a1
       - APP_HOST=0.0.0.0
       - APP_PORT=8082
       - RELOAD=true
diff --git a/examples/auth/docker-compose.route_dependencies.yml b/examples/auth/compose.route_dependencies.yml
similarity index 97%
rename from examples/auth/docker-compose.route_dependencies.yml
rename to examples/auth/compose.route_dependencies.yml
index b10fbb6f..0516fccd 100644
--- a/examples/auth/docker-compose.route_dependencies.yml
+++ b/examples/auth/compose.route_dependencies.yml
@@ -1,5 +1,3 @@
-version: '3.9'
-
 services:
   app-elasticsearch:
     container_name: stac-fastapi-es
@@ -11,7 +9,7 @@ services:
     environment:
       - STAC_FASTAPI_TITLE=stac-fastapi-elasticsearch
       - STAC_FASTAPI_DESCRIPTION=A STAC FastAPI with an Elasticsearch backend
-      - STAC_FASTAPI_VERSION=3.0.0a2
+      - STAC_FASTAPI_VERSION=4.0.0a1
       - APP_HOST=0.0.0.0
       - APP_PORT=8080
       - RELOAD=true
@@ -44,7 +42,7 @@ services:
     environment:
       - STAC_FASTAPI_TITLE=stac-fastapi-opensearch
       - STAC_FASTAPI_DESCRIPTION=A STAC FastAPI with an Opensearch backend
-      - STAC_FASTAPI_VERSION=2.1
+      - STAC_FASTAPI_VERSION=4.0.0a1
       - APP_HOST=0.0.0.0
       - APP_PORT=8082
       - RELOAD=true
diff --git a/examples/pip_docker/docker-compose.yml b/examples/pip_docker/compose.yml
similarity index 98%
rename from examples/pip_docker/docker-compose.yml
rename to examples/pip_docker/compose.yml
index 3b2e6926..c9b3d641 100644
--- a/examples/pip_docker/docker-compose.yml
+++ b/examples/pip_docker/compose.yml
@@ -1,5 +1,3 @@
-version: '3'
-
 services:
   app-elasticsearch:
     container_name: stac-fastapi-es
diff --git a/examples/rate_limit/docker-compose.rate_limit.yml b/examples/rate_limit/compose.rate_limit.yml
similarity index 97%
rename from examples/rate_limit/docker-compose.rate_limit.yml
rename to examples/rate_limit/compose.rate_limit.yml
index 5416e139..3fa902ab 100644
--- a/examples/rate_limit/docker-compose.rate_limit.yml
+++ b/examples/rate_limit/compose.rate_limit.yml
@@ -1,5 +1,3 @@
-version: '3.9'
-
 services:
   app-elasticsearch:
     container_name: stac-fastapi-es
@@ -11,7 +9,7 @@ services:
     environment:
       - STAC_FASTAPI_TITLE=stac-fastapi-elasticsearch
       - STAC_FASTAPI_DESCRIPTION=A STAC FastAPI with an Elasticsearch backend
-      - STAC_FASTAPI_VERSION=2.1
+      - STAC_FASTAPI_VERSION=4.0.0a1
       - APP_HOST=0.0.0.0
       - APP_PORT=8080
       - RELOAD=true
@@ -44,7 +42,7 @@ services:
     environment:
       - STAC_FASTAPI_TITLE=stac-fastapi-opensearch
       - STAC_FASTAPI_DESCRIPTION=A STAC FastAPI with an Opensearch backend
-      - STAC_FASTAPI_VERSION=3.0.0a2
+      - STAC_FASTAPI_VERSION=4.0.0a1
       - APP_HOST=0.0.0.0
       - APP_PORT=8082
       - RELOAD=true
diff --git a/stac_fastapi/core/setup.py b/stac_fastapi/core/setup.py
index 43b3e911..adde5c82 100644
--- a/stac_fastapi/core/setup.py
+++ b/stac_fastapi/core/setup.py
@@ -6,32 +6,31 @@
     desc = f.read()
 
 install_requires = [
-    "fastapi",
+    "fastapi~=0.109.0",
     "attrs>=23.2.0",
-    "pydantic",
-    "stac_pydantic==3.1.*",
+    "pydantic>=2.4.1,<3.0.0",
+    "stac_pydantic~=3.1.0",
     "stac-fastapi.api==5.1.1",
     "stac-fastapi.extensions==5.1.1",
     "stac-fastapi.types==5.1.1",
-    "orjson",
-    "overrides",
-    "geojson-pydantic",
-    "pygeofilter==0.3.1",
-    "jsonschema",
-    "slowapi==0.1.9",
+    "orjson~=3.9.0",
+    "overrides~=7.4.0",
+    "geojson-pydantic~=1.0.0",
+    "pygeofilter~=0.3.1",
+    "jsonschema~=4.0.0",
+    "slowapi~=0.1.9",
 ]
 
 setup(
-    name="stac_fastapi.core",
+    name="stac_fastapi_core",
     description="Core library for the Elasticsearch and Opensearch stac-fastapi backends.",
     long_description=desc,
     long_description_content_type="text/markdown",
-    python_requires=">=3.8",
+    python_requires=">=3.9",
     classifiers=[
         "Intended Audience :: Developers",
         "Intended Audience :: Information Technology",
         "Intended Audience :: Science/Research",
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
diff --git a/stac_fastapi/core/stac_fastapi/core/version.py b/stac_fastapi/core/stac_fastapi/core/version.py
index 3488c82b..af49b95b 100644
--- a/stac_fastapi/core/stac_fastapi/core/version.py
+++ b/stac_fastapi/core/stac_fastapi/core/version.py
@@ -1,2 +1,2 @@
 """library version."""
-__version__ = "4.0.0a0"
+__version__ = "4.0.0a1"
diff --git a/stac_fastapi/elasticsearch/setup.py b/stac_fastapi/elasticsearch/setup.py
index 3355dbe3..1377211b 100644
--- a/stac_fastapi/elasticsearch/setup.py
+++ b/stac_fastapi/elasticsearch/setup.py
@@ -6,38 +6,36 @@
     desc = f.read()
 
 install_requires = [
-    "stac-fastapi.core==4.0.0a0",
-    "elasticsearch[async]==8.11.0",
-    "elasticsearch-dsl==8.11.0",
-    "uvicorn",
-    "starlette",
+    "stac-fastapi-core==4.0.0a1",
+    "elasticsearch[async]~=8.18.0",
+    "uvicorn~=0.23.0",
+    "starlette>=0.35.0,<0.36.0",
 ]
 
 extra_reqs = {
     "dev": [
-        "pytest",
-        "pytest-cov",
-        "pytest-asyncio",
-        "pre-commit",
-        "requests",
-        "ciso8601",
-        "httpx<=0.27.2",
+        "pytest~=7.0.0",
+        "pytest-cov~=4.0.0",
+        "pytest-asyncio~=0.21.0",
+        "pre-commit~=3.0.0",
+        "requests>=2.32.0,<3.0.0",
+        "ciso8601~=2.3.0",
+        "httpx>=0.24.0,<0.28.0",
     ],
-    "docs": ["mkdocs", "mkdocs-material", "pdocs"],
-    "server": ["uvicorn[standard]==0.19.0"],
+    "docs": ["mkdocs~=1.4.0", "mkdocs-material~=9.0.0", "pdocs~=1.2.0"],
+    "server": ["uvicorn[standard]~=0.23.0"],
 }
 
 setup(
-    name="stac_fastapi.elasticsearch",
+    name="stac_fastapi_elasticsearch",
     description="An implementation of STAC API based on the FastAPI framework with both Elasticsearch and Opensearch.",
     long_description=desc,
     long_description_content_type="text/markdown",
-    python_requires=">=3.8",
+    python_requires=">=3.9",
     classifiers=[
         "Intended Audience :: Developers",
         "Intended Audience :: Information Technology",
         "Intended Audience :: Science/Research",
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
diff --git a/stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/config.py b/stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/config.py
index d14295f4..fb9e2e0f 100644
--- a/stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/config.py
+++ b/stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/config.py
@@ -31,7 +31,7 @@ def _es_config() -> Dict[str, Any]:
     # Initialize the configuration dictionary
     config: Dict[str, Any] = {
         "hosts": hosts,
-        "headers": {"accept": "application/vnd.elasticsearch+json; compatible-with=7"},
+        "headers": {"accept": "application/vnd.elasticsearch+json; compatible-with=8"},
     }
 
     # Handle API key
diff --git a/stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/database_logic.py b/stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/database_logic.py
index 38d05e29..ec84de57 100644
--- a/stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/database_logic.py
+++ b/stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/database_logic.py
@@ -8,7 +8,7 @@
 from typing import Any, Dict, Iterable, List, Optional, Tuple, Type
 
 import attr
-from elasticsearch_dsl import Q, Search
+from elasticsearch.dsl import Q, Search
 from starlette.requests import Request
 
 from elasticsearch import exceptions, helpers  # type: ignore
@@ -232,7 +232,7 @@ async def get_all_collections(
             body={
                 "sort": [{"id": {"order": "asc"}}],
                 "size": limit,
-                "search_after": search_after,
+                **({"search_after": search_after} if search_after is not None else {}),
             },
         )
 
@@ -497,7 +497,7 @@ async def execute_search(
                 ignore_unavailable=ignore_unavailable,
                 query=query,
                 sort=sort or DEFAULT_SORT,
-                search_after=search_after,
+                **({"search_after": search_after} if search_after is not None else {}),
                 size=size_limit,
             )
         )
diff --git a/stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/version.py b/stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/version.py
index 3488c82b..af49b95b 100644
--- a/stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/version.py
+++ b/stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/version.py
@@ -1,2 +1,2 @@
 """library version."""
-__version__ = "4.0.0a0"
+__version__ = "4.0.0a1"
diff --git a/stac_fastapi/opensearch/setup.py b/stac_fastapi/opensearch/setup.py
index 8cae5dce..ece68679 100644
--- a/stac_fastapi/opensearch/setup.py
+++ b/stac_fastapi/opensearch/setup.py
@@ -6,38 +6,37 @@
     desc = f.read()
 
 install_requires = [
-    "stac-fastapi.core==4.0.0a0",
-    "opensearch-py==2.4.2",
-    "opensearch-py[async]==2.4.2",
-    "uvicorn",
-    "starlette",
+    "stac-fastapi-core==4.0.0a1",
+    "opensearch-py~=2.8.0",
+    "opensearch-py[async]~=2.8.0",
+    "uvicorn~=0.23.0",
+    "starlette>=0.35.0,<0.36.0",
 ]
 
 extra_reqs = {
     "dev": [
-        "pytest",
-        "pytest-cov",
-        "pytest-asyncio",
-        "pre-commit",
-        "requests",
-        "ciso8601",
-        "httpx<=0.27.2",
+        "pytest~=7.0.0",
+        "pytest-cov~=4.0.0",
+        "pytest-asyncio~=0.21.0",
+        "pre-commit~=3.0.0",
+        "requests>=2.32.0,<3.0.0",
+        "ciso8601~=2.3.0",
+        "httpx>=0.24.0,<0.28.0",
     ],
-    "docs": ["mkdocs", "mkdocs-material", "pdocs"],
-    "server": ["uvicorn[standard]==0.19.0"],
+    "docs": ["mkdocs~=1.4.0", "mkdocs-material~=9.0.0", "pdocs~=1.2.0"],
+    "server": ["uvicorn[standard]~=0.23.0"],
 }
 
 setup(
-    name="stac_fastapi.opensearch",
+    name="stac_fastapi_opensearch",
     description="Opensearch stac-fastapi backend.",
     long_description=desc,
     long_description_content_type="text/markdown",
-    python_requires=">=3.8",
+    python_requires=">=3.9",
     classifiers=[
         "Intended Audience :: Developers",
         "Intended Audience :: Information Technology",
         "Intended Audience :: Science/Research",
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
diff --git a/stac_fastapi/opensearch/stac_fastapi/opensearch/version.py b/stac_fastapi/opensearch/stac_fastapi/opensearch/version.py
index 3488c82b..af49b95b 100644
--- a/stac_fastapi/opensearch/stac_fastapi/opensearch/version.py
+++ b/stac_fastapi/opensearch/stac_fastapi/opensearch/version.py
@@ -1,2 +1,2 @@
 """library version."""
-__version__ = "4.0.0a0"
+__version__ = "4.0.0a1"

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