diff --git a/CHANGELOG.md b/CHANGELOG.md
index c6584ce..f0723f7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,8 +1,8 @@
 # CHANGELOG
 
-**Unreleased**
+**v0.5.0**
 - Support Python 3.12 and 3.13.
-- Speed up encoding by ~85% by optimizing blocklist checks.
+- Speed up encoding by ~85% by optimizing blocklist checks ([PR #23](https://github.com/sqids/sqids-python/pull/23), thanks to [@kurtmckee](https://github.com/kurtmckee)).
   This improvement requires more calculation when the `Sqids` class is instantiated,
   so users are encouraged to instantiate `Sqids` once and always reuse the instance.
 
diff --git a/pyproject.toml b/pyproject.toml
index a3a5848..c22d9b8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
 name = "sqids"
 description = "Generate YouTube-like ids from numbers."
-version = "0.4.1"
+version = "0.5.0"
 readme = "README.md"
 authors = []
 license = { file = "LICENSE" }