diff --git a/Admin/Routes/Web/Api.php b/Admin/Routes/Web/Api.php
index 61d7728..5eef250 100644
--- a/Admin/Routes/Web/Api.php
+++ b/Admin/Routes/Web/Api.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 
 use Modules\Editor\Controller\ApiController;
 use Modules\Editor\Models\PermissionState;
diff --git a/Admin/Routes/Web/Backend.php b/Admin/Routes/Web/Backend.php
index e16952c..cf64d86 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\Editor\Controller\BackendController;
 use Modules\Editor\Models\PermissionState;
diff --git a/Theme/Backend/Lang/Navigation.en.lang.php b/Theme/Backend/Lang/Navigation.en.lang.php
index 95af53b..c2e699e 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 90083a1..19800ad 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/editor-create.tpl.php b/Theme/Backend/editor-create.tpl.php
index 8e49c0b..9ec12d6 100644
--- a/Theme/Backend/editor-create.tpl.php
+++ b/Theme/Backend/editor-create.tpl.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * Orange Management
  *
diff --git a/Theme/Backend/editor-list.tpl.php b/Theme/Backend/editor-list.tpl.php
index 1094b59..6aa4eda 100644
--- a/Theme/Backend/editor-list.tpl.php
+++ b/Theme/Backend/editor-list.tpl.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * Orange Management
  *
diff --git a/Theme/Backend/editor-single.tpl.php b/Theme/Backend/editor-single.tpl.php
index 3538032..371bf1c 100644
--- a/Theme/Backend/editor-single.tpl.php
+++ b/Theme/Backend/editor-single.tpl.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * Orange Management
  *