diff --git a/composer.json b/composer.json
index 32a8985..dbc665c 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,7 @@
     "require-dev": {
         "friendsofphp/php-cs-fixer": "3.95.18",
         "phpunit/phpunit": "^11 || ^12 || ^13",
-        "guzzlehttp/guzzle": "^7.0",
+        "guzzlehttp/guzzle": "^8.0",
         "humbug/box": "^4.6",
         "phpstan/phpstan": "^2.0"
     },