diff --git a/composer.json b/composer.json
index da20235..6eb4ecb 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
         "symfony/polyfill-iconv": "^1.9"
     },
     "require-dev": {
-        "phpunit/phpunit": "<10.0",
+        "phpunit/phpunit": "^9.6|^10.0",
         "friendsofphp/php-cs-fixer": "*",
         "phpstan/phpstan": "*"
     },