diff --git a/package.json b/package.json
index 406caae..8a7e51e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "eslint-plugin-mysticatea",
-  "version": "3.0.2",
+  "version": "4.0.0",
   "description": "Additional ESLint rules.",
   "engines": {
     "node": "^4.0.0 || >=6.0.0"