diff --git a/package.json b/package.json
index 20aa4ecf5..0f74ba26b 100644
--- a/package.json
+++ b/package.json
@@ -69,7 +69,7 @@
     "uuid": "^8.0.0"
   },
   "devDependencies": {
-    "@google-cloud/pubsub": "^3.0.0",
+    "@google-cloud/pubsub": "^4.0.0",
     "@grpc/grpc-js": "^1.0.3",
     "@grpc/proto-loader": "^0.7.0",
     "@types/async-retry": "^1.4.3",
diff --git a/samples/package.json b/samples/package.json
index 82f80ded6..cbfd593a0 100644
--- a/samples/package.json
+++ b/samples/package.json
@@ -16,7 +16,7 @@
     "test": "mocha system-test/*.js --timeout 600000"
   },
   "dependencies": {
-    "@google-cloud/pubsub": "^3.0.0",
+    "@google-cloud/pubsub": "^4.0.0",
     "@google-cloud/storage": "^7.0.1",
     "node-fetch": "^2.6.7",
     "uuid": "^8.0.0",