diff --git a/Admin/Install/Application/Shop/Controller/AppController.php b/Admin/Install/Application/Shop/Controller/AppController.php
index 5533510..75c3d58 100755
--- a/Admin/Install/Application/Shop/Controller/AppController.php
+++ b/Admin/Install/Application/Shop/Controller/AppController.php
@@ -51,14 +51,14 @@ final class AppController extends ModuleAbstract
      *
      * @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 viewFront(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewFront(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Web/{APPNAME}/tpl/front');
@@ -71,14 +71,14 @@ final class AppController extends ModuleAbstract
      *
      * @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 viewComponents(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewComponents(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Web/{APPNAME}/tpl/components');
@@ -91,14 +91,14 @@ final class AppController extends ModuleAbstract
      *
      * @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 viewImprint(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewImprint(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Web/{APPNAME}/tpl/imprint');
@@ -111,14 +111,14 @@ final class AppController extends ModuleAbstract
      *
      * @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 viewTerms(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewTerms(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Web/{APPNAME}/tpl/terms');
@@ -131,14 +131,14 @@ final class AppController extends ModuleAbstract
      *
      * @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 viewDataPrivacy(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewDataPrivacy(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Web/{APPNAME}/tpl/privacy');
@@ -151,14 +151,14 @@ final class AppController extends ModuleAbstract
      *
      * @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 viewList(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewList(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Web/{APPNAME}/tpl/list');
@@ -171,14 +171,14 @@ final class AppController extends ModuleAbstract
      *
      * @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 viewItem(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewItem(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Web/{APPNAME}/tpl/item');
diff --git a/Controller/ApiController.php b/Controller/ApiController.php
index 4482053..856fc91 100755
--- a/Controller/ApiController.php
+++ b/Controller/ApiController.php
@@ -47,7 +47,7 @@ final class ApiController extends Controller
      *
      * @param RequestAbstract  $request  Request
      * @param ResponseAbstract $response Response
-     * @param mixed            $data     Generic data
+     * @param array            $data     Generic data
      *
      * @return void
      *
@@ -55,7 +55,7 @@ final class ApiController extends Controller
      *
      * @since 1.0.0
      */
-    public function apiItemFileDownload(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : void
+    public function apiItemFileDownload(RequestAbstract $request, ResponseAbstract $response, array $data = []) : void
     {
         // Handle public files
         /** @var \Modules\ItemManagement\Models\Item $item */
@@ -134,7 +134,7 @@ final class ApiController extends Controller
      *
      * @param RequestAbstract  $request  Request
      * @param ResponseAbstract $response Response
-     * @param mixed            $data     Generic data
+     * @param array            $data     Generic data
      *
      * @return void
      *
@@ -142,7 +142,7 @@ final class ApiController extends Controller
      *
      * @since 1.0.0
      */
-    public function apiSchemaCreate(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : void
+    public function apiSchemaCreate(RequestAbstract $request, ResponseAbstract $response, array $data = []) : void
     {
         $schema = $this->buildSchema(new NullItem(), $request);
 
@@ -193,7 +193,7 @@ final class ApiController extends Controller
      *
      * @param RequestAbstract  $request  Request
      * @param ResponseAbstract $response Response
-     * @param mixed            $data     Generic data
+     * @param array            $data     Generic data
      *
      * @return void
      *
@@ -201,7 +201,7 @@ final class ApiController extends Controller
      *
      * @since 1.0.0
      */
-    public function apiOneClickBuy(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : void
+    public function apiOneClickBuy(RequestAbstract $request, ResponseAbstract $response, array $data = []) : void
     {
         /** @var \Modules\ClientManagement\Models\Client $client */
         $client = ClientMapper::get()