diff --git a/composer.json b/composer.json
index a3e260c..0b80452 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,7 @@
     }
   ],
   "require": {
-    "guzzlehttp/guzzle": "^7.0",
+    "guzzlehttp/guzzle": "^8.0",
     "guzzlehttp/psr7": "^2.0",
     "php": ">=8.3 <=8.5",
     "sebastiankrupinski/jmap-client-php": "dev-main"