diff --git a/docs/samples/composer.json b/docs/samples/composer.json
index b9cde12..0705b7c 100644
--- a/docs/samples/composer.json
+++ b/docs/samples/composer.json
@@ -4,7 +4,7 @@
         "duncan3dc/cache": "~0.4"
     },
     "require-dev": {
-        "google/cloud-tools": "^0.8",
+        "google/cloud-tools": "0.12.0",
         "phpunit/phpunit": "9.5.20"
     }
 }