diff --git a/package.json b/package.json
index 967ca049a1..23796d86f3 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
   },
   "dependencies": {
     "debug": "~2.6.6",
-    "engine.io": "~3.1.0",
+    "engine.io": "~3.4.0",
     "object-assign": "~4.1.1",
     "opencollective": "^1.0.3",
     "socket.io-adapter": "~1.1.0",