# Upgrade guide
This document provides guidance for upgrading between major versions.
## v3 to v4
### View
The URLs for the GraphiQL assets are now provided by class `MLL\GraphiQL\GraphiQLAsset` instead of `MLL\GraphiQL\DownloadAssetsCommand`.
If you have published the view, update it according to this diff:
```diff
@@ -1,6 +1,8 @@
-@php use MLL\GraphiQL\DownloadAssetsCommand; @endphp
+@php
+use MLL\GraphiQL\GraphiQLAsset;
+@endphp
-
-
-
-
+
+
+
+