diff --git a/Admin/Activate.php b/Admin/Activate.php
index 95fac52..64b6822 100644
--- a/Admin/Activate.php
+++ b/Admin/Activate.php
@@ -13,9 +13,9 @@
  * @version    1.0.0
  * @link       http://orange-management.com
  */
+declare(strict_types=1);
 namespace Modules\HumanResourceManagement\Admin;
 
-
 use phpOMS\DataStorage\Database\DatabasePool;
 use phpOMS\Module\ActivateAbstract;
 use phpOMS\Module\InfoManager;
diff --git a/Admin/Deactivate.php b/Admin/Deactivate.php
index 0355621..4bbc345 100644
--- a/Admin/Deactivate.php
+++ b/Admin/Deactivate.php
@@ -13,9 +13,9 @@
  * @version    1.0.0
  * @link       http://orange-management.com
  */
+declare(strict_types=1);
 namespace Modules\HumanResourceManagement\Admin;
 
-
 use phpOMS\DataStorage\Database\DatabasePool;
 use phpOMS\Module\DeactivateAbstract;
 use phpOMS\Module\InfoManager;
diff --git a/Admin/Install/Navigation.php b/Admin/Install/Navigation.php
index c82c4c3..cd5e29a 100644
--- a/Admin/Install/Navigation.php
+++ b/Admin/Install/Navigation.php
@@ -13,6 +13,7 @@
  * @version    1.0.0
  * @link       http://orange-management.com
  */
+declare(strict_types=1);
 namespace Modules\HumanResourceManagement\Admin\Install;
 use phpOMS\DataStorage\Database\DatabasePool;
 
diff --git a/Admin/Installer.php b/Admin/Installer.php
index 38ff9bc..1d81509 100644
--- a/Admin/Installer.php
+++ b/Admin/Installer.php
@@ -13,6 +13,7 @@
  * @version    1.0.0
  * @link       http://orange-management.com
  */
+declare(strict_types=1);
 namespace Modules\HumanResourceManagement\Admin;
 
 use phpOMS\DataStorage\Database\DatabaseType;
diff --git a/Admin/Uninstall.php b/Admin/Uninstall.php
index eb10804..0cb5ae4 100644
--- a/Admin/Uninstall.php
+++ b/Admin/Uninstall.php
@@ -13,9 +13,9 @@
  * @version    1.0.0
  * @link       http://orange-management.com
  */
+declare(strict_types=1);
 namespace Modules\HumanResourceManagement\Admin;
 
-
 use phpOMS\DataStorage\Database\DatabasePool;
 use phpOMS\DataStorage\Database\Schema\Builder;
 use phpOMS\Module\UninstallAbstract;
diff --git a/Admin/Update.php b/Admin/Update.php
index 6367a4f..07a8747 100644
--- a/Admin/Update.php
+++ b/Admin/Update.php
@@ -13,9 +13,9 @@
  * @version    1.0.0
  * @link       http://orange-management.com
  */
+declare(strict_types=1);
 namespace Modules\HumanResourceManagement\Admin;
 
-
 use phpOMS\DataStorage\Database\DatabasePool;
 use phpOMS\Module\UpdateAbstract;
 use phpOMS\System\File\Directory;
diff --git a/Controller.php b/Controller.php
index 6984556..921b565 100644
--- a/Controller.php
+++ b/Controller.php
@@ -13,6 +13,7 @@
  * @version    1.0.0
  * @link       http://orange-management.com
  */
+declare(strict_types=1);
 namespace Modules\HumanResourceManagement;
 
 use phpOMS\Message\RequestAbstract;
diff --git a/Models/Employee.php b/Models/Employee.php
index b966432..d99a644 100644
--- a/Models/Employee.php
+++ b/Models/Employee.php
@@ -13,6 +13,7 @@
  * @version    1.0.0
  * @link       http://orange-management.com
  */
+declare(strict_types=1);
 namespace Modules\HumanResourceManagement\Models;
 
 use Modules\Admin\Models\Account;
diff --git a/Models/EmployeeHistory.php b/Models/EmployeeHistory.php
index b32ca30..edd030f 100644
--- a/Models/EmployeeHistory.php
+++ b/Models/EmployeeHistory.php
@@ -13,6 +13,7 @@
  * @version    1.0.0
  * @link       http://orange-management.com
  */
+declare(strict_types=1);
 namespace Modules\HumanResourceManagement\Models;
 
 /**
diff --git a/Models/EmployeeHistoryMapper.php b/Models/EmployeeHistoryMapper.php
index 8c3b2c1..dcd7a32 100644
--- a/Models/EmployeeHistoryMapper.php
+++ b/Models/EmployeeHistoryMapper.php
@@ -13,6 +13,7 @@
  * @version    1.0.0
  * @link       http://orange-management.com
  */
+declare(strict_types=1);
 namespace Modules\HumanResourceManagement\Models;
 
 use phpOMS\DataStorage\Database\DataMapperAbstract;
diff --git a/Models/EmployeeMapper.php b/Models/EmployeeMapper.php
index 5ba5f7a..19cf46c 100644
--- a/Models/EmployeeMapper.php
+++ b/Models/EmployeeMapper.php
@@ -13,6 +13,7 @@
  * @version    1.0.0
  * @link       http://orange-management.com
  */
+declare(strict_types=1);
 namespace Modules\HumanResourceManagement\Models;
 
 use Modules\Admin\Models\AccountMapper;
diff --git a/Models/PositionType.php b/Models/PositionType.php
index cd2bdeb..4d8656e 100644
--- a/Models/PositionType.php
+++ b/Models/PositionType.php
@@ -13,6 +13,7 @@
  * @version    1.0.0
  * @link       http://orange-management.com
  */
+declare(strict_types=1);
 namespace Modules\HumanResourceManagement\Models;
 
 use phpOMS\Datatypes\Enum;
diff --git a/Models/StaffList.php b/Models/StaffList.php
index c3611dd..56e25fb 100644
--- a/Models/StaffList.php
+++ b/Models/StaffList.php
@@ -13,6 +13,7 @@
  * @version    1.0.0
  * @link       http://orange-management.com
  */
+declare(strict_types=1);
 namespace Modules\HumanResourceManagement\Models;
 
 use phpOMS\DataStorage\Database\DatabaseType;