diff --git a/composer.json b/composer.json
index 25d1bd4..01e3027 100644
--- a/composer.json
+++ b/composer.json
@@ -33,7 +33,7 @@
         }
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.6"
+        "phpunit/phpunit": "^9.6 || ^13.0"
     },
     "autoload-dev": {
         "psr-4": {