diff --git a/CHANGELOG.md b/CHANGELOG.md
index 77a55ce..ad6104c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ All significant changes to this project will be documented in this file.
 
 ## Unreleased
 
-## v0.4.0
+## v0.4.0 (2026-08-18)
 
 ### Breaking changes