diff --git a/composer.json b/composer.json
index 6839bc3..cd87d9c 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
   },
   "require-dev": {
     "alleyinteractive/alley-coding-standards": "^1.0 || ^2.0",
-    "mantle-framework/testkit": "^0.10.1 || ^0.12.0",
+    "mantle-framework/testkit": "^0.10.1 || ^0.12.0 || ^1.0.0",
     "nunomaduro/collision": "^5.0 || ^6.0 || ^7.0",
     "symfony/filesystem": "^6.0"
   },