diff --git a/composer.json b/composer.json
index 1fa1f4e..0434fb9 100644
--- a/composer.json
+++ b/composer.json
@@ -10,8 +10,9 @@
         }
     ],
     "require": {
-        "silverstripe/framework": "^4.0@dev",
-        "silverstripe/cms": "^4.0@dev"
+        "silverstripe/vendor-plugin": "^1.0",
+        "silverstripe/framework": "^4.0",
+        "silverstripe/cms": "^4.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^5.7",
@@ -20,7 +21,11 @@
     "extra": {
         "branch-alias": {
             "dev-master": "2.x-dev"
-        }
+        },
+        "expose": [
+            "css",
+            "javascript"
+        ]
     },
     "autoload": {
         "psr-4": {
diff --git a/src/Forms/WidgetAreaEditor.php b/src/Forms/WidgetAreaEditor.php
index 18d3441..6072cd5 100644
--- a/src/Forms/WidgetAreaEditor.php
+++ b/src/Forms/WidgetAreaEditor.php
@@ -11,7 +11,6 @@ use SilverStripe\ORM\ArrayList;
 use SilverStripe\ORM\DataObjectInterface;
 use SilverStripe\Widgets\Forms\WidgetAreaEditor;
 use SilverStripe\Widgets\Model\Widget;
-use SilverStripe\View\Requirements;
 
 /**
  * Special field type for selecting and configuring widgets on a page.
@@ -40,9 +39,8 @@ class WidgetAreaEditor extends FormField
      */
     public function FieldHolder($properties = array())
     {
-        $module = ModuleLoader::getModule('silverstripe/widgets');
-        Requirements::css($module->getRelativeResourcePath('css/WidgetAreaEditor.css'));
-        Requirements::javascript($module->getRelativeResourcePath('javascript/WidgetAreaEditor.js'));
+        Requirements::css('silverstripe/widgets:css/WidgetAreaEditor.css');
+        Requirements::javascript('silverstripe/widgets:javascript/WidgetAreaEditor.js');
 
         return $this->renderWith(WidgetAreaEditor::class);
     }