diff --git a/functions/helloworld/package.json b/functions/helloworld/package.json
index 4a896d4ba2..b860df5ec2 100644
--- a/functions/helloworld/package.json
+++ b/functions/helloworld/package.json
@@ -17,7 +17,7 @@
     "test": "ava -T 20s --verbose test/*.test.js"
   },
   "dependencies": {
-    "@google-cloud/debug-agent": "2.1.3",
+    "@google-cloud/debug-agent": "4.2.1",
     "pug": "2.0.0-rc.3",
     "safe-buffer": "5.1.1"
   },