diff --git a/composer.json b/composer.json
index e36ddcf..59e0ed4 100644
--- a/composer.json
+++ b/composer.json
@@ -28,7 +28,7 @@
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3.56",
-        "phpunit/phpunit": "^11.2",
+        "phpunit/phpunit": "^12",
         "phpstan/phpstan": "^2.1",
         "phpstan/phpstan-webmozart-assert": "^2.0"
     },
diff --git a/phpunit.dist.xml b/phpunit.dist.xml
index ad2f7f8..02c0585 100644
--- a/phpunit.dist.xml
+++ b/phpunit.dist.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/11.1/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/12.5/phpunit.xsd"
          bootstrap="vendor/autoload.php"
          cacheDirectory=".phpunit.cache"
          executionOrder="depends,defects"