diff --git a/13-messaging-and-integration-patterns/03-pubsub-chat-zmq/package.json b/13-messaging-and-integration-patterns/03-pubsub-chat-zmq/package.json
index 28aa5356..06ddf168 100644
--- a/13-messaging-and-integration-patterns/03-pubsub-chat-zmq/package.json
+++ b/13-messaging-and-integration-patterns/03-pubsub-chat-zmq/package.json
@@ -8,7 +8,7 @@
   },
   "dependencies": {
     "ws": "^7.2.3",
-    "serve-handler": "^6.1.2",
+    "serve-handler": "^6.1.5",
     "yargs": "^15.3.1",
     "zeromq": "^6.0.0-beta.6"
   },