diff --git a/Admin/Install/Navigation.php b/Admin/Install/Navigation.php
index eb30ec3..dd5d6bd 100644
--- a/Admin/Install/Navigation.php
+++ b/Admin/Install/Navigation.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Billing\Admin\Install
  * @copyright  Dennis Eichhorn
diff --git a/Admin/Installer.php b/Admin/Installer.php
index abd4ffb..a15151b 100644
--- a/Admin/Installer.php
+++ b/Admin/Installer.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Billing\Admin
  * @copyright  Dennis Eichhorn
diff --git a/Admin/Status.php b/Admin/Status.php
index 1bf54d8..5bd2eeb 100644
--- a/Admin/Status.php
+++ b/Admin/Status.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Billing\Admin
  * @copyright  Dennis Eichhorn
diff --git a/Admin/Uninstaller.php b/Admin/Uninstaller.php
index 4b5ec8c..ba58117 100644
--- a/Admin/Uninstaller.php
+++ b/Admin/Uninstaller.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Billing\Admin
  * @copyright  Dennis Eichhorn
diff --git a/Admin/Updater.php b/Admin/Updater.php
index dfc83b5..3c25447 100644
--- a/Admin/Updater.php
+++ b/Admin/Updater.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Billing\Admin
  * @copyright  Dennis Eichhorn
diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index b7cb6db..709f794 100644
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Billing
  * @copyright  Dennis Eichhorn
diff --git a/Controller/Controller.php b/Controller/Controller.php
index d7351da..f0d04d2 100644
--- a/Controller/Controller.php
+++ b/Controller/Controller.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Billing
  * @copyright  Dennis Eichhorn
diff --git a/Models/Invoice.php b/Models/Invoice.php
index 7ef2ac5..d34bcb5 100644
--- a/Models/Invoice.php
+++ b/Models/Invoice.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Billing\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/InvoiceElement.php b/Models/InvoiceElement.php
index a00d4f8..62a673f 100644
--- a/Models/InvoiceElement.php
+++ b/Models/InvoiceElement.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Billing\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/InvoiceMapper.php b/Models/InvoiceMapper.php
index 4eb2fff..bd853bb 100644
--- a/Models/InvoiceMapper.php
+++ b/Models/InvoiceMapper.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Billing
  * @copyright  Dennis Eichhorn
diff --git a/Models/InvoiceStatus.php b/Models/InvoiceStatus.php
index e1c08d7..c2324ef 100644
--- a/Models/InvoiceStatus.php
+++ b/Models/InvoiceStatus.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Billing\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/InvoiceType.php b/Models/InvoiceType.php
index 54a89aa..c56158d 100644
--- a/Models/InvoiceType.php
+++ b/Models/InvoiceType.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Billing\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/PermissionState.php b/Models/PermissionState.php
index e9ca565..6e4c73e 100644
--- a/Models/PermissionState.php
+++ b/Models/PermissionState.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Billing
  * @copyright  Dennis Eichhorn
diff --git a/Theme/Backend/Lang/Navigation.en.lang.php b/Theme/Backend/Lang/Navigation.en.lang.php
index 8be83b0..9628643 100644
--- a/Theme/Backend/Lang/Navigation.en.lang.php
+++ b/Theme/Backend/Lang/Navigation.en.lang.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    TBD
  * @copyright  Dennis Eichhorn
diff --git a/Theme/Backend/Lang/en.lang.php b/Theme/Backend/Lang/en.lang.php
index 30b6856..73d47bd 100644
--- a/Theme/Backend/Lang/en.lang.php
+++ b/Theme/Backend/Lang/en.lang.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    TBD
  * @copyright  Dennis Eichhorn
diff --git a/Theme/Backend/invoice-archive.tpl.php b/Theme/Backend/invoice-archive.tpl.php
index 61e8cd3..e17cb52 100644
--- a/Theme/Backend/invoice-archive.tpl.php
+++ b/Theme/Backend/invoice-archive.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    TBD
  * @copyright  Dennis Eichhorn
diff --git a/Theme/Backend/invoice-create.tpl.php b/Theme/Backend/invoice-create.tpl.php
index 373cf6c..9f5d0a2 100644
--- a/Theme/Backend/invoice-create.tpl.php
+++ b/Theme/Backend/invoice-create.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    TBD
  * @copyright  Dennis Eichhorn
diff --git a/Theme/Backend/invoice-list.tpl.php b/Theme/Backend/invoice-list.tpl.php
index 3ac4d26..6ff9fa1 100644
--- a/Theme/Backend/invoice-list.tpl.php
+++ b/Theme/Backend/invoice-list.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    TBD
  * @copyright  Dennis Eichhorn
diff --git a/Theme/Backend/invoice-single.tpl.php b/Theme/Backend/invoice-single.tpl.php
index 61e8cd3..e17cb52 100644
--- a/Theme/Backend/invoice-single.tpl.php
+++ b/Theme/Backend/invoice-single.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    TBD
  * @copyright  Dennis Eichhorn
diff --git a/Theme/Backend/purchase-invoice-list.tpl.php b/Theme/Backend/purchase-invoice-list.tpl.php
index 2be2d70..668f5ff 100644
--- a/Theme/Backend/purchase-invoice-list.tpl.php
+++ b/Theme/Backend/purchase-invoice-list.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    TBD
  * @copyright  Dennis Eichhorn