diff --git a/composer.json b/composer.json
index 0a455e6..f186ab4 100644
--- a/composer.json
+++ b/composer.json
@@ -20,6 +20,7 @@
         "symfony/validator": "^6.3"
     },
     "require-dev": {
+        "friendsofphp/php-cs-fixer": "^2.19",
         "phpunit/phpunit": "^9.0"
     },
     "autoload": {