diff --git a/3-socket-io/2-basic/package.json b/3-socket-io/2-basic/package.json
old mode 100755
new mode 100644
index acad99f..e2a8906
--- a/3-socket-io/2-basic/package.json
+++ b/3-socket-io/2-basic/package.json
@@ -3,7 +3,7 @@
   "version": "0.0.1",
   "description": "my first socket.io app",
   "dependencies": {
-    "express": "4.10.2",
+    "express": "4.19.2",
     "socket.io": "1.2.0"
   }
 }
\ No newline at end of file