diff --git a/package.json b/package.json
old mode 100755
new mode 100644
index 2333abb..9fa2890
--- a/package.json
+++ b/package.json
@@ -29,6 +29,6 @@
     "should": "~2.0.2",
     "temp": "~0.6.0",
     "ps-tree": "0.0.3",
-    "express": "~3.4.3"
+    "express": "~4.17.1"
   }
 }