diff --git a/Admin/Hooks/Web/Api.php b/Admin/Hooks/Web/Api.php
index efa4c1c..b0bca80 100644
--- a/Admin/Hooks/Web/Api.php
+++ b/Admin/Hooks/Web/Api.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 
 return [
     'POST:Module:.*?\-create' => [
diff --git a/Admin/Routes/Web/Api.php b/Admin/Routes/Web/Api.php
index a72a250..9ba64ce 100644
--- a/Admin/Routes/Web/Api.php
+++ b/Admin/Routes/Web/Api.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 
 
 return [
diff --git a/Admin/Routes/Web/Backend.php b/Admin/Routes/Web/Backend.php
index 6a29380..17b891a 100644
--- a/Admin/Routes/Web/Backend.php
+++ b/Admin/Routes/Web/Backend.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 
 use Modules\Auditor\Controller\BackendController;
 use Modules\Auditor\Models\PermissionState;
diff --git a/Theme/Backend/Lang/Navigation.en.lang.php b/Theme/Backend/Lang/Navigation.en.lang.php
index 058a7f8..7bfbc9e 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/api.en.lang.php b/Theme/Backend/Lang/api.en.lang.php
index b07f33e..2f59807 100644
--- a/Theme/Backend/Lang/api.en.lang.php
+++ b/Theme/Backend/Lang/api.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 5535d38..c96a48a 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/account-list.tpl.php b/Theme/Backend/account-list.tpl.php
index 76bfea9..9ac1c26 100644
--- a/Theme/Backend/account-list.tpl.php
+++ b/Theme/Backend/account-list.tpl.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * Orange Management
  *
diff --git a/Theme/Backend/account-single.tpl.php b/Theme/Backend/account-single.tpl.php
index 606b5f1..ccdd340 100644
--- a/Theme/Backend/account-single.tpl.php
+++ b/Theme/Backend/account-single.tpl.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * Orange Management
  *
@@ -15,4 +15,3 @@
  */
 
 echo $this->getData('nav')->render();
-?>
diff --git a/Theme/Backend/audit-list.tpl.php b/Theme/Backend/audit-list.tpl.php
index c0f586a..0ff27c9 100644
--- a/Theme/Backend/audit-list.tpl.php
+++ b/Theme/Backend/audit-list.tpl.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * Orange Management
  *
diff --git a/Theme/Backend/audit-single.tpl.php b/Theme/Backend/audit-single.tpl.php
index 667b6c1..d153206 100644
--- a/Theme/Backend/audit-single.tpl.php
+++ b/Theme/Backend/audit-single.tpl.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * Orange Management
  *
diff --git a/Theme/Backend/module-list.tpl.php b/Theme/Backend/module-list.tpl.php
index 76bfea9..9ac1c26 100644
--- a/Theme/Backend/module-list.tpl.php
+++ b/Theme/Backend/module-list.tpl.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * Orange Management
  *
diff --git a/Theme/Backend/module-single.tpl.php b/Theme/Backend/module-single.tpl.php
index b971e7b..ccdd340 100644
--- a/Theme/Backend/module-single.tpl.php
+++ b/Theme/Backend/module-single.tpl.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * Orange Management
  *
@@ -14,4 +14,4 @@
  * @var \phpOMS\Views\View $this
  */
 
-echo $this->getData('nav')->render();
\ No newline at end of file
+echo $this->getData('nav')->render();