diff --git a/examples/latency/package.json b/examples/latency/package.json
index c9e60ff1f..57e784121 100644
--- a/examples/latency/package.json
+++ b/examples/latency/package.json
@@ -2,7 +2,7 @@
   "name": "eio-latency",
   "version": "0.1.0",
   "dependencies": {
-    "express": "3.3.5",
+    "express": "4.0.0",
     "enchilada": "0.13.0",
     "engine.io": "1.6.0",
     "engine.io-client": "1.6.0",