diff --git a/composer.json b/composer.json
index c907510..259f6c5 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
     "require-dev": {
         "phpro/grumphp": "~1.0",
         "phpstan/phpstan": "^1.10",
-        "phpunit/phpunit": "^9.0",
+        "phpunit/phpunit": "^9.0 || ^10.0",
         "squizlabs/php_codesniffer": "^3.4",
         "symfony/var-dumper": "^5.0 || ^6.0"
     },