diff --git a/Admin/Install/Media.php b/Admin/Install/Media.php
index ec472a3..ec16d99 100644
--- a/Admin/Install/Media.php
+++ b/Admin/Install/Media.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Admin\Install
  * @copyright Dennis Eichhorn
diff --git a/Admin/Install/Navigation.php b/Admin/Install/Navigation.php
index c179419..5a87319 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\ItemManagement\Admin\Install
  * @copyright Dennis Eichhorn
diff --git a/Admin/Installer.php b/Admin/Installer.php
index 3ce5ab6..03d9bfe 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\ItemManagement\Admin
  * @copyright Dennis Eichhorn
diff --git a/Admin/Status.php b/Admin/Status.php
index 54187f8..8837a14 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\ItemManagement\Admin
  * @copyright Dennis Eichhorn
diff --git a/Admin/Uninstaller.php b/Admin/Uninstaller.php
index 9e8d356..268f03a 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\ItemManagement\Admin
  * @copyright Dennis Eichhorn
diff --git a/Admin/Updater.php b/Admin/Updater.php
index 926760a..abb2c45 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\ItemManagement\Admin
  * @copyright Dennis Eichhorn
diff --git a/Controller/ApiController.php b/Controller/ApiController.php
index 11dc69c..0d49902 100644
--- a/Controller/ApiController.php
+++ b/Controller/ApiController.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement
  * @copyright Dennis Eichhorn
diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index e0f1ccd..19d7577 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\ItemManagement
  * @copyright Dennis Eichhorn
diff --git a/Controller/Controller.php b/Controller/Controller.php
index 2ec8a3e..503e901 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\ItemManagement
  * @copyright Dennis Eichhorn
diff --git a/Models/AttributeValueType.php b/Models/AttributeValueType.php
index f0336f4..df2d3a3 100644
--- a/Models/AttributeValueType.php
+++ b/Models/AttributeValueType.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/Item.php b/Models/Item.php
index 28fdeb6..bfcb15b 100644
--- a/Models/Item.php
+++ b/Models/Item.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/ItemAttribute.php b/Models/ItemAttribute.php
index 4ad4d41..e5bdaf7 100644
--- a/Models/ItemAttribute.php
+++ b/Models/ItemAttribute.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/ItemAttributeMapper.php b/Models/ItemAttributeMapper.php
index ef0eaba..0863c33 100644
--- a/Models/ItemAttributeMapper.php
+++ b/Models/ItemAttributeMapper.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/ItemAttributeType.php b/Models/ItemAttributeType.php
index be87fc6..9ede1cc 100644
--- a/Models/ItemAttributeType.php
+++ b/Models/ItemAttributeType.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/ItemAttributeTypeL11n.php b/Models/ItemAttributeTypeL11n.php
index d498251..6fe69ba 100644
--- a/Models/ItemAttributeTypeL11n.php
+++ b/Models/ItemAttributeTypeL11n.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/ItemAttributeTypeL11nMapper.php b/Models/ItemAttributeTypeL11nMapper.php
index fd96b02..9a40807 100644
--- a/Models/ItemAttributeTypeL11nMapper.php
+++ b/Models/ItemAttributeTypeL11nMapper.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/ItemAttributeTypeMapper.php b/Models/ItemAttributeTypeMapper.php
index be3ebcc..6be4170 100644
--- a/Models/ItemAttributeTypeMapper.php
+++ b/Models/ItemAttributeTypeMapper.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/ItemAttributeValue.php b/Models/ItemAttributeValue.php
index 369d048..4e19aa3 100644
--- a/Models/ItemAttributeValue.php
+++ b/Models/ItemAttributeValue.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/ItemAttributeValueMapper.php b/Models/ItemAttributeValueMapper.php
index 6c63bf9..7ac843e 100644
--- a/Models/ItemAttributeValueMapper.php
+++ b/Models/ItemAttributeValueMapper.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/ItemL11n.php b/Models/ItemL11n.php
index 577ae89..aaf0d3f 100644
--- a/Models/ItemL11n.php
+++ b/Models/ItemL11n.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/ItemL11nMapper.php b/Models/ItemL11nMapper.php
index 2667597..5c13031 100644
--- a/Models/ItemL11nMapper.php
+++ b/Models/ItemL11nMapper.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/ItemL11nType.php b/Models/ItemL11nType.php
index 8f21211..9c4041e 100644
--- a/Models/ItemL11nType.php
+++ b/Models/ItemL11nType.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/ItemL11nTypeMapper.php b/Models/ItemL11nTypeMapper.php
index 2142dab..a56a694 100644
--- a/Models/ItemL11nTypeMapper.php
+++ b/Models/ItemL11nTypeMapper.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/ItemMapper.php b/Models/ItemMapper.php
index e31d379..7752c2a 100644
--- a/Models/ItemMapper.php
+++ b/Models/ItemMapper.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/NullItem.php b/Models/NullItem.php
index 63f9172..3c78e51 100644
--- a/Models/NullItem.php
+++ b/Models/NullItem.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/NullItemAttribute.php b/Models/NullItemAttribute.php
index 5243dec..85ceb9e 100644
--- a/Models/NullItemAttribute.php
+++ b/Models/NullItemAttribute.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/NullItemAttributeType.php b/Models/NullItemAttributeType.php
index 088b038..a0b5f9b 100644
--- a/Models/NullItemAttributeType.php
+++ b/Models/NullItemAttributeType.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/NullItemAttributeTypeL11n.php b/Models/NullItemAttributeTypeL11n.php
index 39c462b..778d706 100644
--- a/Models/NullItemAttributeTypeL11n.php
+++ b/Models/NullItemAttributeTypeL11n.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/NullItemAttributeValue.php b/Models/NullItemAttributeValue.php
index 35459f1..6423019 100644
--- a/Models/NullItemAttributeValue.php
+++ b/Models/NullItemAttributeValue.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/NullItemL11n.php b/Models/NullItemL11n.php
index 9cca59c..3377783 100644
--- a/Models/NullItemL11n.php
+++ b/Models/NullItemL11n.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/NullItemL11nType.php b/Models/NullItemL11nType.php
index accd1c5..0868ade 100644
--- a/Models/NullItemL11nType.php
+++ b/Models/NullItemL11nType.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/PermissionState.php b/Models/PermissionState.php
index 57f486a..141a1cf 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\ItemManagement\Models
  * @copyright Dennis Eichhorn
diff --git a/Models/StockManagementType.php b/Models/StockManagementType.php
index 7d43ade..82583e0 100644
--- a/Models/StockManagementType.php
+++ b/Models/StockManagementType.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Model
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/Lang/Navigation.de.lang.php b/Theme/Backend/Lang/Navigation.de.lang.php
index 6c71fa6..2d61b3b 100644
--- a/Theme/Backend/Lang/Navigation.de.lang.php
+++ b/Theme/Backend/Lang/Navigation.de.lang.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/Lang/Navigation.en.lang.php b/Theme/Backend/Lang/Navigation.en.lang.php
index c8dadf9..beb3bd9 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\ItemManagement
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/Lang/de.lang.php b/Theme/Backend/Lang/de.lang.php
index 5838313..28f5981 100644
--- a/Theme/Backend/Lang/de.lang.php
+++ b/Theme/Backend/Lang/de.lang.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/Lang/en.lang.php b/Theme/Backend/Lang/en.lang.php
index 1c2fff9..daa97ec 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\ItemManagement
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/item-create.tpl.php b/Theme/Backend/item-create.tpl.php
index 2ef27c0..a5e01d0 100644
--- a/Theme/Backend/item-create.tpl.php
+++ b/Theme/Backend/item-create.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/purchase-item-list.tpl.php b/Theme/Backend/purchase-item-list.tpl.php
index 5be7c0d..f64a7e1 100644
--- a/Theme/Backend/purchase-item-list.tpl.php
+++ b/Theme/Backend/purchase-item-list.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/sales-item-list.tpl.php b/Theme/Backend/sales-item-list.tpl.php
index 74e7446..75dc221 100644
--- a/Theme/Backend/sales-item-list.tpl.php
+++ b/Theme/Backend/sales-item-list.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/sales-item-profile.tpl.php b/Theme/Backend/sales-item-profile.tpl.php
index bcfa2d1..1611b44 100644
--- a/Theme/Backend/sales-item-profile.tpl.php
+++ b/Theme/Backend/sales-item-profile.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement
  * @copyright Dennis Eichhorn
diff --git a/Theme/Backend/stock-list.tpl.php b/Theme/Backend/stock-list.tpl.php
index c700b34..da13ccd 100644
--- a/Theme/Backend/stock-list.tpl.php
+++ b/Theme/Backend/stock-list.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   Modules\ItemManagement
  * @copyright Dennis Eichhorn
diff --git a/tests/Admin/AdminTest.php b/tests/Admin/AdminTest.php
index 7f2516d..e87c643 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
diff --git a/tests/Models/ItemMapperTest.php b/tests/Models/ItemMapperTest.php
index 51eb835..9ff568e 100644
--- a/tests/Models/ItemMapperTest.php
+++ b/tests/Models/ItemMapperTest.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.4
+ * PHP Version 8.0
  *
  * @package   tests
  * @copyright Dennis Eichhorn