diff --git a/composer.json b/composer.json
index 2ab4f87..4d837f3 100644
--- a/composer.json
+++ b/composer.json
@@ -28,7 +28,7 @@
   },
   "require-dev": {
     "ergebnis/composer-normalize": "^2",
-    "orchestra/testbench": "^8",
+    "orchestra/testbench": "^9",
     "squizlabs/php_codesniffer": "^3"
   },
   "replace": {