diff --git a/composer.json b/composer.json
index d1caa60..449bcd6 100644
--- a/composer.json
+++ b/composer.json
@@ -40,7 +40,7 @@
 		"phpcompatibility/php-compatibility": "^9.3",
 		"phpstan/phpstan": "^0.12.65",
 		"phpunit/phpunit": "^7.0 | ^8.0 | ^9.0",
-		"slevomat/coding-standard": "^6.3 || ^7.0",
+		"slevomat/coding-standard": "^6.3 || ^7.0 || ^8.0",
 		"squizlabs/php_codesniffer": "^3.3"
 	},
 	"autoload": {