diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9c93304..e331545 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@
 
 ### Changed
 
+## [0.4.0] - 2024-05-21
+
 - Module-first setup #9
 
 ## [0.3.0] - 2024-01-04
diff --git a/package.json b/package.json
index fc38f90..79348d2 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "jotai-immer",
   "description": "👻🪛",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "type": "module",
   "author": "Daishi Kato",
   "repository": {