diff --git a/Admin/Install/Navigation.php b/Admin/Install/Navigation.php
index 2fea358..5ca0ba0 100644
--- a/Admin/Install/Navigation.php
+++ b/Admin/Install/Navigation.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase\Admin\Install
  * @copyright Dennis Eichhorn
diff --git a/Admin/Installer.php b/Admin/Installer.php
index a956c7e..1a1c50b 100644
--- a/Admin/Installer.php
+++ b/Admin/Installer.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase\Admin
  * @copyright Dennis Eichhorn
diff --git a/Admin/Status.php b/Admin/Status.php
index 51f2a8a..babf957 100644
--- a/Admin/Status.php
+++ b/Admin/Status.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase\Admin
  * @copyright Dennis Eichhorn
diff --git a/Admin/Uninstaller.php b/Admin/Uninstaller.php
index e385c38..fdfe3a7 100644
--- a/Admin/Uninstaller.php
+++ b/Admin/Uninstaller.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase\Admin
  * @copyright Dennis Eichhorn
diff --git a/Admin/Updater.php b/Admin/Updater.php
index c9cc362..aac9b90 100644
--- a/Admin/Updater.php
+++ b/Admin/Updater.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase\Admin
  * @copyright Dennis Eichhorn
diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index d52fbab..2fe7427 100644
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase
  * @copyright Dennis Eichhorn
diff --git a/Controller/Controller.php b/Controller/Controller.php
index 9f5f6cf..35bf7f3 100644
--- a/Controller/Controller.php
+++ b/Controller/Controller.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase
  * @copyright Dennis Eichhorn
diff --git a/Models/Article.php b/Models/Article.php
index ca2f4b1..549ba34 100644
--- a/Models/Article.php
+++ b/Models/Article.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/Invoice.php b/Models/Invoice.php
index 03d51f7..395e6b2 100644
--- a/Models/Invoice.php
+++ b/Models/Invoice.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/OrderSuggestion.php b/Models/OrderSuggestion.php
index 9865d28..98763aa 100644
--- a/Models/OrderSuggestion.php
+++ b/Models/OrderSuggestion.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/PermissionState.php b/Models/PermissionState.php
index 8cb874c..22e4ab3 100644
--- a/Models/PermissionState.php
+++ b/Models/PermissionState.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase\Models
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/Lang/Navigation.en.lang.php b/Theme/Backend/Lang/Navigation.en.lang.php
index a13db70..ed2582b 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 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/Lang/api.en.lang.php b/Theme/Backend/Lang/api.en.lang.php
index 6642357..336b8a4 100644
--- a/Theme/Backend/Lang/api.en.lang.php
+++ b/Theme/Backend/Lang/api.en.lang.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/Lang/en.lang.php b/Theme/Backend/Lang/en.lang.php
index f29ed56..4e39253 100644
--- a/Theme/Backend/Lang/en.lang.php
+++ b/Theme/Backend/Lang/en.lang.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/analysis-dashboard.tpl.php b/Theme/Backend/analysis-dashboard.tpl.php
index e6ecd57..698f3e9 100644
--- a/Theme/Backend/analysis-dashboard.tpl.php
+++ b/Theme/Backend/analysis-dashboard.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/article-create.tpl.php b/Theme/Backend/article-create.tpl.php
index e6ecd57..698f3e9 100644
--- a/Theme/Backend/article-create.tpl.php
+++ b/Theme/Backend/article-create.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/article-list.tpl.php b/Theme/Backend/article-list.tpl.php
index e6ecd57..698f3e9 100644
--- a/Theme/Backend/article-list.tpl.php
+++ b/Theme/Backend/article-list.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/article-order-pending-list.tpl.php b/Theme/Backend/article-order-pending-list.tpl.php
index e6ecd57..698f3e9 100644
--- a/Theme/Backend/article-order-pending-list.tpl.php
+++ b/Theme/Backend/article-order-pending-list.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/article-order-suggestion.tpl.php b/Theme/Backend/article-order-suggestion.tpl.php
index e6ecd57..698f3e9 100644
--- a/Theme/Backend/article-order-suggestion.tpl.php
+++ b/Theme/Backend/article-order-suggestion.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/article-single.tpl.php b/Theme/Backend/article-single.tpl.php
index e6ecd57..698f3e9 100644
--- a/Theme/Backend/article-single.tpl.php
+++ b/Theme/Backend/article-single.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/invoice-archive.tpl.php b/Theme/Backend/invoice-archive.tpl.php
index e6ecd57..698f3e9 100644
--- a/Theme/Backend/invoice-archive.tpl.php
+++ b/Theme/Backend/invoice-archive.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/invoice-create.tpl.php b/Theme/Backend/invoice-create.tpl.php
index e6ecd57..698f3e9 100644
--- a/Theme/Backend/invoice-create.tpl.php
+++ b/Theme/Backend/invoice-create.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/invoice-list.tpl.php b/Theme/Backend/invoice-list.tpl.php
index e6ecd57..698f3e9 100644
--- a/Theme/Backend/invoice-list.tpl.php
+++ b/Theme/Backend/invoice-list.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/invoice-single.tpl.php b/Theme/Backend/invoice-single.tpl.php
index e6ecd57..698f3e9 100644
--- a/Theme/Backend/invoice-single.tpl.php
+++ b/Theme/Backend/invoice-single.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\Purchase
  * @copyright Dennis Eichhorn
diff --git a/tests/Admin/AdminTest.php b/tests/Admin/AdminTest.php
index f56b413..a7b6e21 100644
--- a/tests/Admin/AdminTest.php
+++ b/tests/Admin/AdminTest.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   tests
  * @copyright Dennis Eichhorn