diff --git a/composer.json b/composer.json
index 4c181f5..b57b718 100644
--- a/composer.json
+++ b/composer.json
@@ -41,7 +41,7 @@
     },
     "require-dev": {
         "laminas/laminas-coding-standard": "~3.1.0",
-        "phpunit/phpunit": "^11.5.42",
+        "phpunit/phpunit": "^12.0.0",
         "psalm/plugin-phpunit": "^0.19.5",
         "vimeo/psalm": "^6.13.1",
         "amphp/dns": "^1.24 || ^2.1.2",