diff --git a/composer.json b/composer.json
index cb55e878..c680b374 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
 		"phpstan/phpstan-php-parser": "^1.1",
 		"phpstan/phpstan-phpunit": "^1.0",
 		"phpstan/phpstan-strict-rules": "^1.1",
-		"phpunit/phpunit": "^8.5|^9.5",
+		"phpunit/phpunit": "^9.6.21",
 		"symplify/easy-coding-standard": "^11.4",
 		"tomasvotruba/unused-public": "^0.3",
 		"vlucas/phpdotenv": "^5.4"