diff --git a/examples/latency/package.json b/examples/latency/package.json
index c9e60ff1..08aa35c2 100644
--- a/examples/latency/package.json
+++ b/examples/latency/package.json
@@ -4,7 +4,7 @@
   "dependencies": {
     "express": "3.3.5",
     "enchilada": "0.13.0",
-    "engine.io": "1.6.0",
+    "engine.io": "4.0.0",
     "engine.io-client": "1.6.0",
     "smoothie": "1.19.0"
   }