diff --git a/package.json b/package.json
index 4563b5a..5433913 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@notebox/nb-crdt",
-  "version": "4.0.0",
+  "version": "4.0.1",
   "author": "KANG Myung-hun",
   "description": "block based CRDT",
   "repository": {