diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index b0f5733..27006f3 100755
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -38,14 +38,14 @@ final class BackendController extends Controller implements DashboardElementInte
      *
      * @param RequestAbstract  $request  Request
      * @param ResponseAbstract $response Response
-     * @param mixed            $data     Generic data
+     * @param array            $data     Generic data
      *
      * @return RenderableInterface
      *
      * @since 1.0.0
      * @codeCoverageIgnore
      */
-    public function viewCalendarDashboard(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewCalendarDashboard(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
 
@@ -71,7 +71,7 @@ final class BackendController extends Controller implements DashboardElementInte
      * {@inheritdoc}
      * @codeCoverageIgnore
      */
-    public function viewDashboard(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewDashboard(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         /** @var \phpOMS\Model\Html\Head $head */
         $head = $response->data['Content']->head;