diff --git a/package.json b/package.json
index 7b7c62666..29b281f51 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "main": "lib/core/index.js",
   "typings": "index.d.ts",
   "license": "MIT",
-  "version": "4.0.0-alpha.49",
+  "version": "4.0.0-alpha.50",
   "author": "kobezzza <kobezzza@gmail.com> (https://github.com/kobezzza)",
   "repository": {
     "type": "git",