diff --git a/WebSocketDiscussionRoom/package.json b/WebSocketDiscussionRoom/package.json
index a5fb5da2..868d25e0 100644
--- a/WebSocketDiscussionRoom/package.json
+++ b/WebSocketDiscussionRoom/package.json
@@ -3,7 +3,7 @@
      "description": "example chat application with socket.io",
      "version": "0.0.1",
      "dependencies": {
-        "express": "4.17.1",
+        "express": "4.20.0",
         "socket.io": ">=2.4.0",
         "mysql": "2.18.0"
      }