diff --git a/CHANGELOG.md b/CHANGELOG.md
index 06dd7791..1e68864e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,27 +13,20 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ### Fixed
 
-## [v4.0.0a2] - 2025-04-20
+## [v4.0.0] - 2025-04-23
 
 ### 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)
+- Included default queryables configuration for seamless integration. [#351](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/351)
 - Added support for high-performance direct response mode for both Elasticsearch and Opensearch backends, controlled by the `ENABLE_DIRECT_RESPONSE` environment variable. When enabled (`ENABLE_DIRECT_RESPONSE=true`), endpoints return Starlette Response objects directly, bypassing FastAPI's jsonable_encoder and Pydantic serialization for significantly improved performance on large search responses. **Note:** In this mode, all FastAPI dependencies (including authentication, custom status codes, and validation) are disabled for all routes. Default is `false` for safety. A warning is logged at startup if enabled. See [issue #347](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/issues/347) and [PR #359](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/359).
 - Added robust tests for the `ENABLE_DIRECT_RESPONSE` environment variable, covering both Elasticsearch and OpenSearch backends. Tests gracefully handle missing backends by attempting to import both configs and skipping if neither is available. [#359](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/359)
 
 ### Changed
-- Updated test suite to use `httpx.ASGITransport(app=...)` for FastAPI app testing (removes deprecation warning). [#359](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/359)
-- Updated stac-fastapi parent libraries to 5.2.0. [#359](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/359)
-- Migrated Elasticsearch index template creation from legacy `put_template` to composable `put_index_template` API in `database_logic.py`. This resolves deprecation warnings and ensures compatibility with Elasticsearch 7.x and 8.x. [#359](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/359)
-- Updated all Pydantic models to use `ConfigDict` instead of class-based `Config` for Pydantic v2 compatibility. This resolves deprecation warnings and prepares for Pydantic v3. [#359](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/359)
-- Migrated all Pydantic `@root_validator` validators to `@model_validator` for Pydantic v2 compatibility. [#359](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/359)
-- Migrated startup event handling from deprecated `@app.on_event("startup")` to FastAPI's recommended lifespan context manager. This removes deprecation warnings and ensures compatibility with future FastAPI versions. [#359](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/359)
-- Refactored all boolean environment variable parsing in both Elasticsearch and OpenSearch backends to use the shared `get_bool_env` utility. This ensures robust and consistent handling of environment variables such as `ES_USE_SSL`, `ES_HTTP_COMPRESS`, and `ES_VERIFY_CERTS` across both backends. [#359](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/359)
-
-
-### Fixed
-
-## [v4.0.0a1] - 2925-04-17
-
-### Changed
+- Refactored database logic to reduce duplication [#351](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/351)
+- Replaced `fastapi-slim` with `fastapi` dependency [#351](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/351)
+- Changed minimum Python version to 3.9 [#354](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/354)
+- Updated stac-fastapi api, types, and extensions libraries to 5.1.1 from 3.0.0 and made various associated changes [#354](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/354)
+- Changed makefile commands from 'docker-compose' to 'docker compose' [#354](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/354)
 - 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`
@@ -41,23 +34,17 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
   - 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 `STAC_FASTAPI_VERSION` environment variables to 4.0.0 in all compose files [#362](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/362)
+- Bumped version from 4.0.0a2 to 4.0.0 for the PEP 625 compliant release [#362](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/362)
 - 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)
-- Included default queryables configuration for seamless integration. [#351](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/351)
-
-### Changed
-- Refactored database logic to reduce duplication [#351](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/351)
-- Replaced `fastapi-slim` with `fastapi` dependency [#351](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/351)
-- Changed minimum Python version to 3.9 [#354](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/354)
-- Updated stac-fastapi api, types, and extensions libraries to 5.1.1 from 3.0.0 and made various associated changes [#354](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/354)
-- Changed makefile commands from 'docker-compose' to 'docker compose' [#354](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/354)
+- Updated test suite to use `httpx.ASGITransport(app=...)` for FastAPI app testing (removes deprecation warning). [#359](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/359)
+- Updated stac-fastapi parent libraries to 5.2.0. [#359](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/359)
+- Migrated Elasticsearch index template creation from legacy `put_template` to composable `put_index_template` API in `database_logic.py`. This resolves deprecation warnings and ensures compatibility with Elasticsearch 7.x and 8.x. [#359](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/359)
+- Updated all Pydantic models to use `ConfigDict` instead of class-based `Config` for Pydantic v2 compatibility. This resolves deprecation warnings and prepares for Pydantic v3. [#359](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/359)
+- Migrated all Pydantic `@root_validator` validators to `@model_validator` for Pydantic v2 compatibility. [#359](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/359)
+- Migrated startup event handling from deprecated `@app.on_event("startup")` to FastAPI's recommended lifespan context manager. This removes deprecation warnings and ensures compatibility with future FastAPI versions. [#361](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/361)
+- Refactored all boolean environment variable parsing in both Elasticsearch and OpenSearch backends to use the shared `get_bool_env` utility. This ensures robust and consistent handling of environment variables such as `ES_USE_SSL`, `ES_HTTP_COMPRESS`, and `ES_VERIFY_CERTS` across both backends. [#359](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/359)
 
 ### Fixed
 - Improved performance of `mk_actions` and `filter-links` methods [#351](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/351)
@@ -361,10 +348,8 @@ 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-opensearch/compare/v4.0.0a2...main
-[v4.0.0a2]: https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/compare/v4.0.0a1...v4.0.0a2
-[v4.0.0a1]: https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/compare/v4.0.0a0...v4.0.0a1
-[v4.0.0a0]: https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/compare/v3.2.5...v4.0.0a0
+[Unreleased]: https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/compare/v4.0.0...main
+[v4.0.0]: https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/compare/v3.2.5...v4.0.0
 [v3.2.5]: https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/compare/v3.2.4...v3.2.5
 [v3.2.4]: https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/compare/v3.2.3...v3.2.4
 [v3.2.3]: https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/compare/v3.2.2...v3.2.3
diff --git a/compose.yml b/compose.yml
index 8f982ccb..24905483 100644
--- a/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=4.0.0a2
+      - STAC_FASTAPI_VERSION=4.0.0
       - 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=4.0.0a2
+      - STAC_FASTAPI_VERSION=4.0.0
       - APP_HOST=0.0.0.0
       - APP_PORT=8082
       - RELOAD=true
diff --git a/examples/auth/compose.basic_auth.yml b/examples/auth/compose.basic_auth.yml
index 88e95fa0..37de4013 100644
--- a/examples/auth/compose.basic_auth.yml
+++ b/examples/auth/compose.basic_auth.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=4.0.0a2
+      - STAC_FASTAPI_VERSION=4.0.0
       - APP_HOST=0.0.0.0
       - APP_PORT=8080
       - RELOAD=true
@@ -42,7 +42,7 @@ services:
     environment:
       - STAC_FASTAPI_TITLE=stac-fastapi-opensearch
       - STAC_FASTAPI_DESCRIPTION=A STAC FastAPI with an Opensearch backend
-      - STAC_FASTAPI_VERSION=4.0.0a2
+      - STAC_FASTAPI_VERSION=4.0.0
       - APP_HOST=0.0.0.0
       - APP_PORT=8082
       - RELOAD=true
diff --git a/examples/auth/compose.oauth2.yml b/examples/auth/compose.oauth2.yml
index 3a295862..09a3aa7b 100644
--- a/examples/auth/compose.oauth2.yml
+++ b/examples/auth/compose.oauth2.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=4.0.0a2
+      - STAC_FASTAPI_VERSION=4.0.0
       - APP_HOST=0.0.0.0
       - APP_PORT=8080
       - RELOAD=true
@@ -43,7 +43,7 @@ services:
     environment:
       - STAC_FASTAPI_TITLE=stac-fastapi-opensearch
       - STAC_FASTAPI_DESCRIPTION=A STAC FastAPI with an Opensearch backend
-      - STAC_FASTAPI_VERSION=4.0.0a2
+      - STAC_FASTAPI_VERSION=4.0.0
       - APP_HOST=0.0.0.0
       - APP_PORT=8082
       - RELOAD=true
diff --git a/examples/auth/compose.route_dependencies.yml b/examples/auth/compose.route_dependencies.yml
index 08576691..da73e2bb 100644
--- a/examples/auth/compose.route_dependencies.yml
+++ b/examples/auth/compose.route_dependencies.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=4.0.0a2
+      - STAC_FASTAPI_VERSION=4.0.0
       - APP_HOST=0.0.0.0
       - APP_PORT=8080
       - RELOAD=true
@@ -42,7 +42,7 @@ services:
     environment:
       - STAC_FASTAPI_TITLE=stac-fastapi-opensearch
       - STAC_FASTAPI_DESCRIPTION=A STAC FastAPI with an Opensearch backend
-      - STAC_FASTAPI_VERSION=4.0.0a2
+      - STAC_FASTAPI_VERSION=4.0.0
       - APP_HOST=0.0.0.0
       - APP_PORT=8082
       - RELOAD=true
diff --git a/examples/rate_limit/compose.rate_limit.yml b/examples/rate_limit/compose.rate_limit.yml
index 7d4340fb..0f516dae 100644
--- a/examples/rate_limit/compose.rate_limit.yml
+++ b/examples/rate_limit/compose.rate_limit.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=4.0.0a2
+      - STAC_FASTAPI_VERSION=4.0.0
       - APP_HOST=0.0.0.0
       - APP_PORT=8080
       - RELOAD=true
@@ -42,7 +42,7 @@ services:
     environment:
       - STAC_FASTAPI_TITLE=stac-fastapi-opensearch
       - STAC_FASTAPI_DESCRIPTION=A STAC FastAPI with an Opensearch backend
-      - STAC_FASTAPI_VERSION=4.0.0a2
+      - STAC_FASTAPI_VERSION=4.0.0
       - APP_HOST=0.0.0.0
       - APP_PORT=8082
       - RELOAD=true
diff --git a/stac_fastapi/core/stac_fastapi/core/version.py b/stac_fastapi/core/stac_fastapi/core/version.py
index 2c71d558..6356730f 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__ = "4.0.0a2"
+__version__ = "4.0.0"
diff --git a/stac_fastapi/elasticsearch/setup.py b/stac_fastapi/elasticsearch/setup.py
index 77158e44..aa4a9371 100644
--- a/stac_fastapi/elasticsearch/setup.py
+++ b/stac_fastapi/elasticsearch/setup.py
@@ -6,7 +6,7 @@
     desc = f.read()
 
 install_requires = [
-    "stac-fastapi-core==4.0.0a2",
+    "stac-fastapi-core==4.0.0",
     "elasticsearch[async]~=8.18.0",
     "uvicorn~=0.23.0",
     "starlette>=0.35.0,<0.36.0",
diff --git a/stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/app.py b/stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/app.py
index 9aefca43..9ccf009a 100644
--- a/stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/app.py
+++ b/stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/app.py
@@ -90,7 +90,7 @@
 api = StacApi(
     title=os.getenv("STAC_FASTAPI_TITLE", "stac-fastapi-elasticsearch"),
     description=os.getenv("STAC_FASTAPI_DESCRIPTION", "stac-fastapi-elasticsearch"),
-    api_version=os.getenv("STAC_FASTAPI_VERSION", "4.0.0a2"),
+    api_version=os.getenv("STAC_FASTAPI_VERSION", "4.0.0"),
     settings=settings,
     extensions=extensions,
     client=CoreClient(
diff --git a/stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/version.py b/stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/version.py
index 2c71d558..6356730f 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__ = "4.0.0a2"
+__version__ = "4.0.0"
diff --git a/stac_fastapi/opensearch/setup.py b/stac_fastapi/opensearch/setup.py
index 4d718733..c7427500 100644
--- a/stac_fastapi/opensearch/setup.py
+++ b/stac_fastapi/opensearch/setup.py
@@ -6,7 +6,7 @@
     desc = f.read()
 
 install_requires = [
-    "stac-fastapi-core==4.0.0a2",
+    "stac-fastapi-core==4.0.0",
     "opensearch-py~=2.8.0",
     "opensearch-py[async]~=2.8.0",
     "uvicorn~=0.23.0",
diff --git a/stac_fastapi/opensearch/stac_fastapi/opensearch/app.py b/stac_fastapi/opensearch/stac_fastapi/opensearch/app.py
index 07c48e67..e7df7779 100644
--- a/stac_fastapi/opensearch/stac_fastapi/opensearch/app.py
+++ b/stac_fastapi/opensearch/stac_fastapi/opensearch/app.py
@@ -90,7 +90,7 @@
 api = StacApi(
     title=os.getenv("STAC_FASTAPI_TITLE", "stac-fastapi-opensearch"),
     description=os.getenv("STAC_FASTAPI_DESCRIPTION", "stac-fastapi-opensearch"),
-    api_version=os.getenv("STAC_FASTAPI_VERSION", "4.0.0a2"),
+    api_version=os.getenv("STAC_FASTAPI_VERSION", "4.0.0"),
     settings=settings,
     extensions=extensions,
     client=CoreClient(
diff --git a/stac_fastapi/opensearch/stac_fastapi/opensearch/version.py b/stac_fastapi/opensearch/stac_fastapi/opensearch/version.py
index 2c71d558..6356730f 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__ = "4.0.0a2"
+__version__ = "4.0.0"