diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index 852455d..2df53e3 100755
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -40,14 +40,14 @@ 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 viewAuditorList(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewAuditorList(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Modules/Auditor/Theme/Backend/audit-list');
@@ -142,14 +142,14 @@ 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 viewAuditorSingle(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewAuditorSingle(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Modules/Auditor/Theme/Backend/audit-single');
diff --git a/Controller/CliController.php b/Controller/CliController.php
index f3b3783..fa6ad2a 100755
--- a/Controller/CliController.php
+++ b/Controller/CliController.php
@@ -41,14 +41,14 @@ final class CliController extends Controller
      *
      * @param RequestAbstract  $request  Request
      * @param ResponseAbstract $response Response
-     * @param mixed            $data     Generic data
+     * @param array            $data     Generic data
      *
      * @return RenderableInterface Response can be rendered
      *
      * @since 1.0.0
      * @codeCoverageIgnore
      */
-    public function cliGenerateBlockchain(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function cliGenerateBlockchain(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Modules/Auditor/Theme/Cli/blockchain');