README update

README.md

@@ -13,7 +13,7 @@ A simple Bootstrap-style Card for Silverstripe Elemental. Intended for use with
 ## Requirements
 
 * dnadesign/silverstripe-elemental: ^5.0
-* silverstripe/linkfield: ^3
+* silverstripe/linkfield: ^4.0
 
 ## Installation
 
@@ -31,6 +31,10 @@ A simple Bootstrap-style Card for Silverstripe Elemental. Intended for use with
 
 The default templates are based off [Bootstrap 5](https://getbootstrap.com/) card component.
 
+## Upgrading from version 1
+
+This module drops `gorriecoe/silverstripe-linkfield` usage in favor of `silverstripe/linkfield`.
+
 ## Getting more elements
 
 See [Elemental modules by Dynamic](https://github.com/orgs/dynamic/repositories?q=elemental&type=all&language=&sort=)