diff --git a/Admin/Routes/Web/Backend.php b/Admin/Routes/Web/Backend.php
index e72e6d7..5222ad5 100644
--- a/Admin/Routes/Web/Backend.php
+++ b/Admin/Routes/Web/Backend.php
@@ -1,11 +1,10 @@
-<?php
+<?php declare(strict_types=1);
 
 use Modules\ClientManagement\Controller\BackendController;
 use Modules\ClientManagement\Models\PermissionState;
 use phpOMS\Account\PermissionType;
 use phpOMS\Router\RouteVerb;
 
-
 return [
     '^.*/sales/client/list.*$' => [
         [
diff --git a/Theme/Backend/Lang/Navigation.en.lang.php b/Theme/Backend/Lang/Navigation.en.lang.php
index b07f33e..2f59807 100644
--- a/Theme/Backend/Lang/Navigation.en.lang.php
+++ b/Theme/Backend/Lang/Navigation.en.lang.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * Orange Management
  *
diff --git a/Theme/Backend/Lang/en.lang.php b/Theme/Backend/Lang/en.lang.php
index cb008f6..fb450e5 100644
--- a/Theme/Backend/Lang/en.lang.php
+++ b/Theme/Backend/Lang/en.lang.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * Orange Management
  *
diff --git a/Theme/Backend/clients-create.tpl.php b/Theme/Backend/clients-create.tpl.php
index af3a86f..b03b5f4 100644
--- a/Theme/Backend/clients-create.tpl.php
+++ b/Theme/Backend/clients-create.tpl.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * Orange Management
  *
diff --git a/Theme/Backend/clients-list.tpl.php b/Theme/Backend/clients-list.tpl.php
index 6208a67..c901a24 100644
--- a/Theme/Backend/clients-list.tpl.php
+++ b/Theme/Backend/clients-list.tpl.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * Orange Management
  *
diff --git a/Theme/Backend/clients-profile.tpl.php b/Theme/Backend/clients-profile.tpl.php
index 0433d67..038b06c 100644
--- a/Theme/Backend/clients-profile.tpl.php
+++ b/Theme/Backend/clients-profile.tpl.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * Orange Management
  *