diff --git a/composer.json b/composer.json
index a9e94a4..f526625 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^7.0|^8.0",
-        "orchestra/testbench": "^3.5.5|^3.6|^4.0",
+        "orchestra/testbench": "^3.5.5|^3.8|^4.0",
         "friendsofphp/php-cs-fixer": "^2.14"
     },
     "autoload": {