diff --git a/package.json b/package.json
index 83f9a11..5da7556 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
       "mocha": ">= 0.11.0"
     , "expect.js": ">= 0.1.1"
     , "rimraf": ">= 1.0.8"
-    , "express": "2.x"
+    , "express": "4.x"
     , "request": ">= 2.2.9"
     , "jade": ">= 0.19.0"
    }