diff --git a/examples/cluster-nginx/server/package.json b/examples/cluster-nginx/server/package.json
index e3ae8207c9..0549dd8df9 100644
--- a/examples/cluster-nginx/server/package.json
+++ b/examples/cluster-nginx/server/package.json
@@ -8,7 +8,7 @@
   "license": "MIT",
   "dependencies": {
     "@socket.io/redis-adapter": "^7.0.1",
-    "express": "4.13.4",
+    "express": "4.21.2",
     "redis": "^3.1.2",
     "socket.io": "^4.0.0"
   },