diff --git a/composer.json b/composer.json
index 3df2035..adeaa50 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
     },
     "require-dev": {
         "mockery/mockery": "^1.2.3",
-        "orchestra/testbench": "^4.0 || ^5.0",
+        "orchestra/testbench": "^6.0",
         "phpunit/phpunit": "^8.0 || ^9.0",
         "roave/security-advisories": "dev-master",
         "zing/coding-standard": "^2.3"