diff --git a/appengine/pubsub/package.json b/appengine/pubsub/package.json
index 89e3ff4ad1..64b1319ab4 100644
--- a/appengine/pubsub/package.json
+++ b/appengine/pubsub/package.json
@@ -13,10 +13,10 @@
     "test": "repo-tools test app && mocha */*.test.js --timeout=30000 --exit"
   },
   "dependencies": {
-    "@google-cloud/pubsub": "^0.28.0",
+    "@google-cloud/pubsub": "^4.0.0",
     "body-parser": "^1.18.3",
     "express": "^4.16.3",
-    "google-auth-library": "^4.0.0",
+    "google-auth-library": "^9.0.0",
     "pug": "^2.0.1",
     "safe-buffer": "^5.1.2"
   },