diff --git a/composer.json b/composer.json
index cc26ad5..dff89ca 100644
--- a/composer.json
+++ b/composer.json
@@ -43,7 +43,7 @@
     "require-dev": {
         "phpunit/phpunit": "^7.3|^8.5|^9.4|^10.0|^11.0",
         "php-mock/php-mock": "^2.0",
-        "orchestra/testbench": "^3.8|^4.8|^5.7|^6.2|^7.0|^8.0",
+        "orchestra/testbench": "^3.8|^4.8|^5.7|^6.2|^7.0|^8.0|^9.0",
         "umbrellio/code-style-php": "^1.0",
         "laravel/legacy-factories": "^1.0",
         "php-coveralls/php-coveralls": "^2.1",