diff --git a/composer.json b/composer.json
index 18b597b..e554ddd 100644
--- a/composer.json
+++ b/composer.json
@@ -53,7 +53,7 @@
         "laminas/laminas-diactoros": "^3.0",
         "mockery/mockery": "^1.6",
         "nyholm/psr7": "^1.5",
-        "phpunit/phpunit": "^10.0",
+        "phpunit/phpunit": "^10.0 || ^12.0",
         "vimeo/psalm": "^6.11"
     },
     "scripts": {