diff --git a/package.json b/package.json
old mode 100755
new mode 100644
index a239f75b..e7c49a85
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
     "postinstall": "node node_modules/grunt-cli/bin/grunt install"
   },
   "dependencies": {
-    "express": "~3.4.0",
+    "express": "~4.17.1",
     "jade": "~0.35.0",
     "bower": "~1.3.8",
     "mongoose": "~3.6.20",