diff --git a/composer.json b/composer.json
index 3f4eb31..bb94ff5 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
         "mikey179/vfsstream": "^1.6",
         "phpro/grumphp": "~1.0",
         "phpstan/phpstan": "^1.10",
-        "phpunit/phpunit": "^9.0",
+        "phpunit/phpunit": "^9.0 || ^10.0",
         "roave/infection-static-analysis-plugin": "^1.32",
         "squizlabs/php_codesniffer": "^3.5",
         "symfony/var-dumper": "^5.0 || ^6.0",