diff --git a/appengine/memcached/package.json b/appengine/memcached/package.json
index bf4921f337..c053a69c97 100644
--- a/appengine/memcached/package.json
+++ b/appengine/memcached/package.json
@@ -12,7 +12,7 @@
     "start": "node app.js"
   },
   "dependencies": {
-    "express": "4.14.1",
+    "express": "4.21.2",
     "memjs": "0.10.0"
   }
 }