diff --git a/Controller/ApiController.php b/Controller/ApiController.php
index 5bf995f..61fe3b4 100755
--- a/Controller/ApiController.php
+++ b/Controller/ApiController.php
@@ -386,7 +386,7 @@ 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
      *
@@ -394,7 +394,7 @@ final class ApiController extends Controller
      *
      * @since 1.0.0
      */
-    public function apiTemplateCreate(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : void
+    public function apiTemplateCreate(RequestAbstract $request, ResponseAbstract $response, array $data = []) : void
     {
         $dbFiles       = $request->getDataJson('media-list');
         $uploadedFiles = $request->files;
@@ -558,7 +558,7 @@ 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
      *
@@ -566,7 +566,7 @@ final class ApiController extends Controller
      *
      * @since 1.0.0
      */
-    public function apiReportCreate(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : void
+    public function apiReportCreate(RequestAbstract $request, ResponseAbstract $response, array $data = []) : void
     {
         if (!empty($val = $this->validateReportCreate($request))) {
             $response->header->status = RequestStatusCode::R_400;
diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index 4c4328a..59b6872 100755
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -42,14 +42,14 @@ final class BackendController extends Controller
      *
      * @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 viewTemplateList(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewTemplateList(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
 
@@ -81,14 +81,14 @@ final class BackendController extends Controller
      *
      * @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 viewTemplateCreate(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewTemplateCreate(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
 
@@ -107,14 +107,14 @@ final class BackendController extends Controller
      *
      * @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 viewReportCreate(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewReportCreate(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
 
@@ -133,7 +133,7 @@ final class BackendController extends Controller
      *
      * @param RequestAbstract  $request  Request
      * @param ResponseAbstract $response Response
-     * @param mixed            $data     Generic data
+     * @param array            $data     Generic data
      *
      * @return RenderableInterface
      *
@@ -142,7 +142,7 @@ final class BackendController extends Controller
      * @since 1.0.0
      * @codeCoverageIgnore
      */
-    public function viewHelperReport(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewHelperReport(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         //$file = preg_replace('([^\w\s\d\-_~,;:\.\[\]\(\).])', '', $template->getName());