diff --git a/package.json b/package.json
index 5760b776f0..f26ea390ed 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
   ],
   "dependencies": {
     "debug": "*",
-    "engine.io": "",
+    "engine.io": "0.4.3",
     "socket.io-parser": "1.0.2",
     "socket.io-client": "1.0.0",
     "send": "~0.1.0"