diff --git a/package.json b/package.json
index 2baa7c8..7f9fd14 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
     "node": "0.10.x"
   },
   "dependencies": {
-    "express": "3.1.0",
+    "express": "4.0.0",
     "jade": "0.28.1",
     "stylus": "0.32.1"
   },