diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 0ee8c01..2537c1f 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.3.0"
+  ".": "0.4.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3cf856f..eea68af 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.4.0](https://github.com/bedrock-python/sqlalchemy-foundation-kit/compare/sqlalchemy-foundation-kit-v0.3.0...sqlalchemy-foundation-kit-v0.4.0) (2026-09-07)
+
+
+### Features
+
+* measure the wait for a pool connection, and count pool checkout timeouts ([#27](https://github.com/bedrock-python/sqlalchemy-foundation-kit/issues/27)) ([78c9d7e](https://github.com/bedrock-python/sqlalchemy-foundation-kit/commit/78c9d7e2c05052090276bce08219047849cd6dbb))
+
 ## [0.3.0](https://github.com/bedrock-python/sqlalchemy-foundation-kit/compare/sqlalchemy-foundation-kit-v0.2.1...sqlalchemy-foundation-kit-v0.3.0) (2026-09-07)
 
 
diff --git a/sqlalchemy_foundation_kit/__init__.py b/sqlalchemy_foundation_kit/__init__.py
index 56ba530..5dcde47 100644
--- a/sqlalchemy_foundation_kit/__init__.py
+++ b/sqlalchemy_foundation_kit/__init__.py
@@ -65,7 +65,7 @@
 try:
     __version__ = version("sqlalchemy-foundation-kit")
 except PackageNotFoundError:  # pragma: no cover
-    __version__ = "0.3.0"
+    __version__ = "0.4.0"
 
 __all__ = [  # noqa: RUF022
     # Base ORM
diff --git a/sqlalchemy_foundation_kit/__version__.py b/sqlalchemy_foundation_kit/__version__.py
index 7e1d86a..9ce25b8 100644
--- a/sqlalchemy_foundation_kit/__version__.py
+++ b/sqlalchemy_foundation_kit/__version__.py
@@ -1 +1 @@
-__version__ = "0.3.0"  # x-release-please-version
+__version__ = "0.4.0"  # x-release-please-version