diff --git a/composer.json b/composer.json
index 4d1d26e..348f452 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
         "pontedilana/php-weasyprint": "^1.3"
     },
     "require-dev": {
-        "orchestra/testbench": "^7|^8",
+        "orchestra/testbench": "^7|^8|^9",
         "squizlabs/php_codesniffer": "^3.5"
     },
     "autoload": {