diff --git a/Controller/ApiController.php b/Controller/ApiController.php
index 066b4d0..2d37f58 100755
--- a/Controller/ApiController.php
+++ b/Controller/ApiController.php
@@ -42,7 +42,7 @@ 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
      *
@@ -50,7 +50,7 @@ final class ApiController extends Controller
      *
      * @since 1.0.0
      */
-    public function apiSessionCreate(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : void
+    public function apiSessionCreate(RequestAbstract $request, ResponseAbstract $response, array $data = []) : void
     {
         if (!$this->app->accountManager->get($request->header->account)->hasPermission(
             PermissionType::CREATE, $this->app->unitId, $this->app->appId, self::NAME, PermissionCategory::SESSION_FOREIGN
@@ -124,7 +124,7 @@ 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
      *
@@ -132,7 +132,7 @@ final class ApiController extends Controller
      *
      * @since 1.0.0
      */
-    public function apiSessionElementCreate(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : void
+    public function apiSessionElementCreate(RequestAbstract $request, ResponseAbstract $response, array $data = []) : void
     {
         if (($request->getDataInt('status') ?? -1) === ClockingStatus::START) {
             $this->apiSessionCreate($request, $response);
@@ -234,7 +234,7 @@ 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
      *
@@ -242,7 +242,7 @@ final class ApiController extends Controller
      *
      * @since 1.0.0
      */
-    public function apiSessionUpdate(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : void
+    public function apiSessionUpdate(RequestAbstract $request, ResponseAbstract $response, array $data = []) : void
     {
     }
 
@@ -251,7 +251,7 @@ 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
      *
@@ -259,7 +259,7 @@ final class ApiController extends Controller
      *
      * @since 1.0.0
      */
-    public function apiSessionElementUpdate(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : void
+    public function apiSessionElementUpdate(RequestAbstract $request, ResponseAbstract $response, array $data = []) : void
     {
     }
 
@@ -268,7 +268,7 @@ 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
      *
@@ -276,7 +276,7 @@ final class ApiController extends Controller
      *
      * @since 1.0.0
      */
-    public function apiSessionDelete(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : void
+    public function apiSessionDelete(RequestAbstract $request, ResponseAbstract $response, array $data = []) : void
     {
     }
 
@@ -285,7 +285,7 @@ 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
      *
@@ -293,7 +293,7 @@ final class ApiController extends Controller
      *
      * @since 1.0.0
      */
-    public function apiSessionElementDelete(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : void
+    public function apiSessionElementDelete(RequestAbstract $request, ResponseAbstract $response, array $data = []) : void
     {
     }
 }
diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index eb417f9..0cd38ac 100755
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -39,7 +39,7 @@ final class BackendController extends Controller implements DashboardElementInte
     /**
      * {@inheritdoc}
      */
-    public function viewDashboard(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewDashboard(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Modules/HumanResourceTimeRecording/Theme/Backend/dashboard');
@@ -57,14 +57,14 @@ 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 viewPrivateDashboard(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewPrivateDashboard(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Modules/HumanResourceTimeRecording/Theme/Backend/private-dashboard');
@@ -103,14 +103,14 @@ 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 viewPrivateSession(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewPrivateSession(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Modules/HumanResourceTimeRecording/Theme/Backend/private-session');
@@ -140,14 +140,14 @@ 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 viewHRStats(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewHRStats(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Modules/HumanResourceTimeRecording/Theme/Backend/hr-stats');
diff --git a/Controller/TimerecordingController.php b/Controller/TimerecordingController.php
index 957fa92..f3710c1 100755
--- a/Controller/TimerecordingController.php
+++ b/Controller/TimerecordingController.php
@@ -36,14 +36,14 @@ final class TimerecordingController 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 viewDashboard(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
+    public function viewDashboard(RequestAbstract $request, ResponseAbstract $response, array $data = []) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Modules/HumanResourceTimeRecording/Theme/Timeterminal/overview');