diff --git a/package.json b/package.json
index d12fe40..a180a98 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "koa",
-  "version": "0.4.0",
+  "version": "0.5.0",
   "description": "Koa web app framework",
   "main": "index.js",
   "scripts": {