diff --git a/Admin/Routes/Web/Backend.php b/Admin/Routes/Web/Backend.php
index 41028e0..c56f14d 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\HumanResourceManagement\Controller\BackendController;
 use Modules\HumanResourceManagement\Models\PermissionState;
diff --git a/Theme/Backend/Lang/Navigation.en.lang.php b/Theme/Backend/Lang/Navigation.en.lang.php
index 76bb54a..ce71cab 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 ab58df1..45882c5 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/department-list.tpl.php b/Theme/Backend/department-list.tpl.php
index 6e2c764..aecd57d 100644
--- a/Theme/Backend/department-list.tpl.php
+++ b/Theme/Backend/department-list.tpl.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * Orange Management
  *
diff --git a/Theme/Backend/planning-dashboard.tpl.php b/Theme/Backend/planning-dashboard.tpl.php
index 5067e06..faf5e82 100644
--- a/Theme/Backend/planning-dashboard.tpl.php
+++ b/Theme/Backend/planning-dashboard.tpl.php
@@ -1,5 +1,5 @@
 <div class="b b-1 c24-1 c24" id="i24-1-1">
-    <header><h1><?= $this->printHtml($this->app->accountManager->get($request->getHeader()->getAccount())->getL11n()->lang['HumanResourceManagement']['Vacation'] ); ?></h1></header>
+    <header><h1><?= $this->printHtml($this->app->accountManager->get($request->getHeader()->getAccount())->getL11n()->lang['HumanResourceManagement']['Vacation']); ?></h1></header>
 
     <div class="bc-1">
         <div class="cT">
@@ -26,13 +26,13 @@
         <!-- @formatter:on -->
         <div class="cT">
             <a href="<?= \phpOMS\Uri\UriFactory::build('{/prefix}sales/analysis/clients/dashboard'); ?>"
-               class="button"><?= $this->printHtml($this->app->accountManager->get($request->getHeader()->getAccount())->getL11n()->lang[0]['More'] ); ?></a>
+               class="button"><?= $this->printHtml($this->app->accountManager->get($request->getHeader()->getAccount())->getL11n()->lang[0]['More']); ?></a>
         </div>
     </div>
 </div>
 
 <div class="b b-1 c24-1 c24" id="i24-1-1">
-    <header><h1><?= $this->printHtml($this->app->accountManager->get($request->getHeader()->getAccount())->getL11n()->lang['HumanResourceManagement']['Shifts'] ); ?></h1></header>
+    <header><h1><?= $this->printHtml($this->app->accountManager->get($request->getHeader()->getAccount())->getL11n()->lang['HumanResourceManagement']['Shifts']); ?></h1></header>
 
     <div class="bc-1">
         <div class="cT">
@@ -59,13 +59,13 @@
         <!-- @formatter:on -->
         <div class="cT">
             <a href=""
-               class="button"><?= $this->printHtml($this->app->accountManager->get($request->getHeader()->getAccount())->getL11n()->lang[0]['More'] ); ?></a>
+               class="button"><?= $this->printHtml($this->app->accountManager->get($request->getHeader()->getAccount())->getL11n()->lang[0]['More']); ?></a>
         </div>
     </div>
 </div>
 
 <div class="b b-1 c24-1 c24" id="i24-1-1">
-    <header><h1><?= $this->printHtml($this->app->accountManager->get($request->getHeader()->getAccount())->getL11n()->lang['HumanResourceManagement']['Personnel'] ); ?></h1></header>
+    <header><h1><?= $this->printHtml($this->app->accountManager->get($request->getHeader()->getAccount())->getL11n()->lang['HumanResourceManagement']['Personnel']); ?></h1></header>
 
     <div class="bc-1">
         <div class="cT">
@@ -92,7 +92,7 @@
         <!-- @formatter:on -->
         <div class="cT">
             <a href=""
-               class="button"><?= $this->printHtml($this->app->accountManager->get($request->getHeader()->getAccount())->getL11n()->lang[0]['More'] ); ?></a>
+               class="button"><?= $this->printHtml($this->app->accountManager->get($request->getHeader()->getAccount())->getL11n()->lang[0]['More']); ?></a>
         </div>
     </div>
 </div>
diff --git a/Theme/Backend/staff-create.tpl.php b/Theme/Backend/staff-create.tpl.php
index 18e6dd3..ccdd340 100644
--- a/Theme/Backend/staff-create.tpl.php
+++ b/Theme/Backend/staff-create.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/staff-list.tpl.php b/Theme/Backend/staff-list.tpl.php
index df97df6..22f2b0b 100644
--- a/Theme/Backend/staff-list.tpl.php
+++ b/Theme/Backend/staff-list.tpl.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * Orange Management
  *
diff --git a/Theme/Backend/staff-single.tpl.php b/Theme/Backend/staff-single.tpl.php
index ef39e6a..884568f 100644
--- a/Theme/Backend/staff-single.tpl.php
+++ b/Theme/Backend/staff-single.tpl.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * Orange Management
  *