diff --git a/debugger/package.json b/debugger/package.json
index b363d7089a..1751e74a90 100644
--- a/debugger/package.json
+++ b/debugger/package.json
@@ -20,7 +20,7 @@
     "e2e-test": "repo-tools test deploy"
   },
   "dependencies": {
-    "@google-cloud/debug-agent": "3.0.1",
+    "@google-cloud/debug-agent": "4.2.1",
     "express": "4.16.4"
   },
   "devDependencies": {