diff --git a/.version b/.version
index 2f5ef73..d27833d 100644
--- a/.version
+++ b/.version
@@ -1 +1 @@
-{"version":"0.3.0"}
+{"version":"0.4.0"}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5a2e94b..50b8bb9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## [0.4.0] - 2025-12-29
+
+### 🚀 Features
+
+- *(session-cleanup)* Implement session expiration cleanup
 ## [0.3.0] - 2025-12-28
 
 ### 🚀 Features