diff --git a/src/Http/Controllers/LiveupdateBooleanController.php b/src/Http/Controllers/LiveupdateBooleanController.php
index d15d6b3..9bd7982 100644
--- a/src/Http/Controllers/LiveupdateBooleanController.php
+++ b/src/Http/Controllers/LiveupdateBooleanController.php
@@ -11,7 +11,7 @@ public function update(NovaRequest $request)
     {
         $resourceClass = $request->resource();
         $resourceValidationRules = $resourceClass::rulesForUpdate($request);
-        $fieldValidationRules = $resourceValidationRules[$request->attribute];
+        $fieldValidationRules = $resourceValidationRules[$request->attribute]  ?? [];
 
         if (!empty($fieldValidationRules)) {
             $validatedData = $request->validate(