diff --git a/CHANGELOG.md b/CHANGELOG.md
index abb1a58..63d93fa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,8 @@
 # Release Notes for Element API
 
-## Unreleased
+## 4.0.0 - 2024-03-11
 
+- Added Craft 5 compatibility. ([#186](https://github.com/craftcms/element-api/pull/186))
 - Updated Fractal to 0.20. ([#183](https://github.com/craftcms/element-api/pull/183))
 
 ## 3.0.1.1 - 2022-07-07