diff --git a/Admin/Installer.php b/Admin/Installer.php
index ac0e4a8..a099ae2 100644
--- a/Admin/Installer.php
+++ b/Admin/Installer.php
@@ -17,6 +17,7 @@ namespace Modules\HumanResourceManagement\Admin;
 
 use phpOMS\DataStorage\Database\DatabaseType;
 use phpOMS\DataStorage\Database\Pool;
+use phpOMS\Module\InfoManager;
 use phpOMS\Module\InstallerAbstract;
 
 /**
diff --git a/Admin/Routes/http.php b/Admin/Routes/http.php
index ea049fa..8cdfbbf 100644
--- a/Admin/Routes/http.php
+++ b/Admin/Routes/http.php
@@ -1,5 +1,7 @@
 <?php
 
+use phpOMS\Router\RouteVerb;
+
 return [
     '^.*/backend/hr/staff/list.*$' => [
         [
diff --git a/Controller.php b/Controller.php
index b36a37e..a9f8bda 100644
--- a/Controller.php
+++ b/Controller.php
@@ -88,7 +88,7 @@ class Controller extends ModuleAbstract implements WebInterface
      * @since  1.0.0
      * @author Dennis Eichhorn <d.eichhorn@oms.com>
      */
-    public function viewHrList(RequestAbstract $request, ResponseAbstract $response, $data = null) : RenderableInterface
+    public function viewHrList(RequestAbstract $request, ResponseAbstract $response, $data = null) : \Serializable
     {
         $view = new View($this->app, $request, $response);
         $view->setTemplate('/Modules/HumanResourceManagement/Theme/Backend/staff-list');
@@ -110,7 +110,7 @@ class Controller extends ModuleAbstract implements WebInterface
      * @since  1.0.0
      * @author Dennis Eichhorn <d.eichhorn@oms.com>
      */
-    public function viewHrCreate(RequestAbstract $request, ResponseAbstract $response, $data = null) : RenderableInterface
+    public function viewHrCreate(RequestAbstract $request, ResponseAbstract $response, $data = null) : \Serializable
     {
         $view = new View($this->app, $request, $response);
         $view->setTemplate('/Modules/HumanResourceManagement/Theme/Backend/staff-create');
@@ -129,7 +129,7 @@ class Controller extends ModuleAbstract implements WebInterface
      * @since  1.0.0
      * @author Dennis Eichhorn <d.eichhorn@oms.com>
      */
-    public function viewHrDepartmentList(RequestAbstract $request, ResponseAbstract $response, $data = null) : RenderableInterface
+    public function viewHrDepartmentList(RequestAbstract $request, ResponseAbstract $response, $data = null) : \Serializable
     {
         $view = new View($this->app, $request, $response);
         $view->setTemplate('/Modules/HumanResourceManagement/Theme/Backend/department-list');
diff --git a/Theme/Backend/Lang/en.lang.php b/Theme/Backend/Lang/en.lang.php
index 6c5918f..b1c7642 100644
--- a/Theme/Backend/Lang/en.lang.php
+++ b/Theme/Backend/Lang/en.lang.php
@@ -13,7 +13,7 @@
  * @version    1.0.0
  * @link       http://orange-management.com
  */
-$MODLANG['HumanResourceManagement'] = [
+return ['HumanResourceManagement' => [
     'Department'  => 'Department',
     'Departments' => 'Departments',
     'Employees'   => 'Employees',
@@ -24,4 +24,4 @@ $MODLANG['HumanResourceManagement'] = [
     'Staff'       => 'Staff',
     'Status'      => 'Status',
     'Vacation'    => 'Vacation',
-];
+]];
diff --git a/Theme/backend/Lang/Navigation.en.lang.php b/Theme/backend/Lang/Navigation.en.lang.php
index 572764c..e5eb586 100644
--- a/Theme/backend/Lang/Navigation.en.lang.php
+++ b/Theme/backend/Lang/Navigation.en.lang.php
@@ -13,7 +13,7 @@
  * @version    1.0.0
  * @link       http://orange-management.com
  */
-$MODLANG['Navigation'] = [
+return ['Navigation' => [
     'Departments'             => 'Departments',
     'Employees'               => 'Employees',
     'HumanResources'          => 'Human Resources',
@@ -24,4 +24,4 @@ $MODLANG['Navigation'] = [
     'Shifts'                  => 'Shifts',
     'Staff'                   => 'Staff',
     'Structure'               => 'Structure',
-];
+]];
diff --git a/Theme/backend/Lang/en.lang.php b/Theme/backend/Lang/en.lang.php
index 6c5918f..b1c7642 100644
--- a/Theme/backend/Lang/en.lang.php
+++ b/Theme/backend/Lang/en.lang.php
@@ -13,7 +13,7 @@
  * @version    1.0.0
  * @link       http://orange-management.com
  */
-$MODLANG['HumanResourceManagement'] = [
+return ['HumanResourceManagement' => [
     'Department'  => 'Department',
     'Departments' => 'Departments',
     'Employees'   => 'Employees',
@@ -24,4 +24,4 @@ $MODLANG['HumanResourceManagement'] = [
     'Staff'       => 'Staff',
     'Status'      => 'Status',
     'Vacation'    => 'Vacation',
-];
+]];