diff --git a/composer.json b/composer.json
index e889413..eda9bb5 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
         "php": ">=7.1"
     },
     "require-dev": {
-		"friendsofphp/php-cs-fixer": "2.9.*",
+		"friendsofphp/php-cs-fixer": "2.9.* || 2.18.*",
         "squizlabs/php_codesniffer": "^3.4.0",
         "phpunit/phpunit": "7.1.*",
         "php-coveralls/php-coveralls": "^2.1.0"