diff --git a/composer.json b/composer.json
index 0f4f41f..6af14c7 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
   "require-dev": {
     "ergebnis/composer-normalize": "^2",
     "phpstan/phpstan": "^2",
-    "phpunit/phpunit": "^11",
+    "phpunit/phpunit": "^12",
     "roave/security-advisories": "dev-latest"
   },
   "autoload": {