diff --git a/storage/composer.json b/storage/composer.json
index d77d3e2e7..be7dc724d 100644
--- a/storage/composer.json
+++ b/storage/composer.json
@@ -5,6 +5,6 @@
     },
     "require-dev": {
         "google/cloud-pubsub": "^2.0",
-        "guzzlehttp/guzzle": "^7.0"
+        "guzzlehttp/guzzle": "^8.0"
     }
 }