diff --git a/package.json b/package.json
index ef0678f..15ad859 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "colyseus.js",
-  "version": "0.5.0-beta.0",
+  "version": "0.5.0",
   "description": "JavaScript client for Colyseus Multiplayer Game Server",
   "keywords": [
     "multiplayer",
@@ -35,6 +35,7 @@
     "websocket.js": "^0.1.4"
   },
   "devDependencies": {
+    "@types/chai": "^3.4.34",
     "@types/fast-json-patch": "^1.0.4",
     "@types/fossil-delta": "^0.2.1",
     "@types/msgpack-lite": "^0.1.1",