diff --git a/package.json b/package.json
index d1c53ff..8989320 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "underscore.string": ">= 2.1.1",
     "mocha": "~1.7.4",
     "chai": "~1.4.2",
-    "express": "~3.0.6"
+    "express": "~4.17.1"
   },
   "main": "index",
   "scripts": {