diff --git a/CHANGELOG.md b/CHANGELOG.md
index 22b5a2d..35a5706 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,16 @@
 
 <!--next-version-placeholder-->
 
+## v0.4.0 (2023-01-11)
+### Feature
+* 🎉 feat: add typing stubs and update tests  ([`60a7324`](https://github.com/darvid/python-hyperscan/commit/60a7324b489a7dac27095311bfb34a9b07e480c3))
+
+### Fix
+* 🐛 fix: fix memory leak in loadb (#46) and minor doc tweaks  ([`71b6462`](https://github.com/darvid/python-hyperscan/commit/71b64627e940c1e34ad8dde18f7b5800c113c25a))
+
+### Other
+* 🛸 ci: update release pipeline  ([`4f70032`](https://github.com/darvid/python-hyperscan/commit/4f7003273267f7dff0877ad28157a63c34e17960))
+
 ## v0.3.3 (2022-12-14)
 
 ### Bugfix
diff --git a/pyproject.toml b/pyproject.toml
index e13a9b6..daf185e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,7 +29,7 @@ known-first-party = ["hyperscan"]
 
 [tool.commitizen]
 name = "cz_commitizen_emoji"
-version = "0.3.3"
+version = "0.4.0"
 version_files = [
   "pyproject.toml:version",
   "src/hyperscan/__init__.py:__version__",
@@ -38,7 +38,7 @@ version_files = [
 [tool.poetry]
 build = "build.py"
 name = "hyperscan"
-version = "0.3.3"
+version = "0.4.0"
 description = "Python bindings for Hyperscan."
 authors = ["David Gidwani <david.gidwani@gmail.com>"]
 license = "MIT"
diff --git a/src/hyperscan/__init__.py b/src/hyperscan/__init__.py
index 5909525..2491a9d 100644
--- a/src/hyperscan/__init__.py
+++ b/src/hyperscan/__init__.py
@@ -2,7 +2,7 @@
 
 from hyperscan._hyperscan import *  # noqa: F401, F403
 
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 
 
 class ExpressionExt(typing.NamedTuple):