diff --git a/composer.json b/composer.json
index f6891c4..3ef427d 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,7 @@
     "require-dev": {
       "phpunit/phpunit": "^8.0|^9.0",
       "php-vcr/php-vcr": "^1.4",
-      "friendsofphp/php-cs-fixer": "^3.0",
+      "friendsofphp/php-cs-fixer": "3.45.0",
       "php-coveralls/php-coveralls": "^2.1",
       "dms/phpunit-arraysubset-asserts": "^0.4 | ^0.5"
     } ,