diff --git a/composer.json b/composer.json
index 0685a97e..60fb498c 100644
--- a/composer.json
+++ b/composer.json
@@ -41,6 +41,7 @@
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3.41",
         "matthiasnoback/symfony-dependency-injection-test": "^4.0 || ^5.0",
+        "phpunit/phpunit": "^9.6",
         "symfony/console": "^5.4 || ^6.0 || ^7.0",
         "symfony/phpunit-bridge": "^5.4 || ^6.0 || ^7.0",
         "symfony/yaml": "^5.4 || ^6.0 || ^7.0"