diff --git a/package.json b/package.json
index 350f99b..66f23a3 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
   "devDependencies": {
     "should": "~1.2.1",
     "mocha": "~1.8.1",
-    "express": "~3.1.0",
+    "express": "~4.17.1",
     "connect": "~2.7.2",
     "ejs": "~0.8.3"
   }