diff --git a/composer.json b/composer.json
index b79a2fc..8537d03 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
         "php-di/php-di": "^6",
         "phpstan/phpstan": "^1",
         "phpunit/phpunit": "^6 || ^7",
-        "squizlabs/php_codesniffer": "^3"
+        "squizlabs/php_codesniffer": "^4"
     },
     "autoload": {
         "psr-4": {