diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3cc0f53..71753e7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 Changes adhere to [semantic versioning](https://semver.org).
 
-## [4.0.0] - UNRELEASED
+## [4.0.0] - 2024/10/25
 
 > This is a major version upgrade. Other versions are incompatible with this release.