diff --git a/samples/package.json b/samples/package.json
index 3942172..0352b47 100644
--- a/samples/package.json
+++ b/samples/package.json
@@ -11,7 +11,7 @@
     "test": "mocha"
   },
   "dependencies": {
-    "@google-cloud/promisify": "^1.0.4"
+    "@google-cloud/promisify": "^2.0.0"
   },
   "devDependencies": {
     "chai": "^4.2.0",