diff --git a/package.json b/package.json
index 2833dc1..fbc9e80 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
   "description": "AngularJS provider and service for Pusher",
   "homepage": "http://angular-pusher-example.herokuapp.com/",
   "devDependencies": {
-    "express": "~3.4.4",
+    "express": "~4.17.1",
     "grunt": "~0.4.1",
     "grunt-contrib-concat": "~0.3.0",
     "grunt-contrib-uglify": "~0.2.5",