diff --git a/components/socket.io/examples/chat/package.json b/components/socket.io/examples/chat/package.json
old mode 100755
new mode 100644
index 4894335..cba19f9
--- a/components/socket.io/examples/chat/package.json
+++ b/components/socket.io/examples/chat/package.json
@@ -7,6 +7,6 @@
   "private": true,
   "license": "BSD",
   "dependencies": {
-    "express": "3.4.8"
+    "express": "4.17.1"
   }
 }
\ No newline at end of file