diff --git a/src/Api/Controllers/UpdateHeaderItemController.php b/src/Api/Controllers/UpdateHeaderItemController.php
index 58d02ca..a647321 100644
--- a/src/Api/Controllers/UpdateHeaderItemController.php
+++ b/src/Api/Controllers/UpdateHeaderItemController.php
@@ -58,8 +58,8 @@ protected function data(ServerRequestInterface $request, Document $document)
         $id = Arr::get($request->getQueryParams(), 'id');
         $data = $request->getParsedBody();
 
-        if (Arr::has($data, 'attributes.header')) {
-            Arr::set($data, 'attributes.header', Header::decode(Arr::get($data, 'attributes.header')));
+        if (Arr::has($data, 'data.attributes.header')) {
+            Arr::set($data, 'data.attributes.header', Header::decode(Arr::get($data, 'data.attributes.header')));
         }
 
         $this->validator->assertValid($data);