diff --git a/Admin/Install/Navigation.php b/Admin/Install/Navigation.php
index 52c00c4..8c960de 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\Calendar\Admin\Install
  * @copyright  Dennis Eichhorn
diff --git a/Admin/Installer.php b/Admin/Installer.php
index 6b99da1..634764a 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\Calendar\Admin
  * @copyright  Dennis Eichhorn
diff --git a/Admin/Status.php b/Admin/Status.php
index 0dbcf0f..e503fe5 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\Calendar\Admin
  * @copyright  Dennis Eichhorn
diff --git a/Admin/Uninstaller.php b/Admin/Uninstaller.php
index ba19fe8..a5bf8a2 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\Calendar\Admin
  * @copyright  Dennis Eichhorn
diff --git a/Admin/Updater.php b/Admin/Updater.php
index 09d8d19..421f4dd 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\Calendar\Admin
  * @copyright  Dennis Eichhorn
diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index 815149d..d12c6ac 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\Calendar
  * @copyright  Dennis Eichhorn
diff --git a/Controller/Controller.php b/Controller/Controller.php
index aa229d2..33c15cd 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\Calendar
  * @copyright  Dennis Eichhorn
diff --git a/Models/AcceptStatus.php b/Models/AcceptStatus.php
index 6227a89..0cb28aa 100644
--- a/Models/AcceptStatus.php
+++ b/Models/AcceptStatus.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Calendar\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/AvailableStatus.php b/Models/AvailableStatus.php
index f0c312c..d89e348 100644
--- a/Models/AvailableStatus.php
+++ b/Models/AvailableStatus.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Calendar\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/Calendar.php b/Models/Calendar.php
index c69975c..7c6d9c2 100644
--- a/Models/Calendar.php
+++ b/Models/Calendar.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Calendar\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/CalendarMapper.php b/Models/CalendarMapper.php
index 17a28a8..186b9bb 100644
--- a/Models/CalendarMapper.php
+++ b/Models/CalendarMapper.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Calendar\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/Event.php b/Models/Event.php
index 31b5314..be8cf3c 100644
--- a/Models/Event.php
+++ b/Models/Event.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Calendar\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/EventMapper.php b/Models/EventMapper.php
index 76eb5d7..8731ae5 100644
--- a/Models/EventMapper.php
+++ b/Models/EventMapper.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Calendar\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/EventStatus.php b/Models/EventStatus.php
index 9eee36b..aef5a57 100644
--- a/Models/EventStatus.php
+++ b/Models/EventStatus.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Calendar\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/EventTemplate.php b/Models/EventTemplate.php
index fde2d52..da36a2f 100644
--- a/Models/EventTemplate.php
+++ b/Models/EventTemplate.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Calendar\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/EventType.php b/Models/EventType.php
index d58a422..3d159b6 100644
--- a/Models/EventType.php
+++ b/Models/EventType.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Calendar\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/FrequencyInterval.php b/Models/FrequencyInterval.php
index ed042cb..0e23d92 100644
--- a/Models/FrequencyInterval.php
+++ b/Models/FrequencyInterval.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Calendar\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/FrequencyRelative.php b/Models/FrequencyRelative.php
index ed83203..621c3d2 100644
--- a/Models/FrequencyRelative.php
+++ b/Models/FrequencyRelative.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Calendar\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/FrequencyType.php b/Models/FrequencyType.php
index fcc326e..8af2aea 100644
--- a/Models/FrequencyType.php
+++ b/Models/FrequencyType.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Calendar\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/IntervalType.php b/Models/IntervalType.php
index 6a9a225..0b2db6d 100644
--- a/Models/IntervalType.php
+++ b/Models/IntervalType.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Calendar\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/NullCalendar.php b/Models/NullCalendar.php
index 62f19d2..9b3fefb 100644
--- a/Models/NullCalendar.php
+++ b/Models/NullCalendar.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Calendar\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/NullEvent.php b/Models/NullEvent.php
index de1946e..6ac8659 100644
--- a/Models/NullEvent.php
+++ b/Models/NullEvent.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Calendar\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/NullSchedule.php b/Models/NullSchedule.php
index a82c783..16fcafe 100644
--- a/Models/NullSchedule.php
+++ b/Models/NullSchedule.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Calendar\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/PermissionState.php b/Models/PermissionState.php
index cdf9318..9304609 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\Calendar
  * @copyright  Dennis Eichhorn
diff --git a/Models/Schedule.php b/Models/Schedule.php
index 8bf8ab6..cd54bc2 100644
--- a/Models/Schedule.php
+++ b/Models/Schedule.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Calendar\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/ScheduleMapper.php b/Models/ScheduleMapper.php
index 65dd6ea..ba1ed44 100644
--- a/Models/ScheduleMapper.php
+++ b/Models/ScheduleMapper.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Calendar\Models
  * @copyright  Dennis Eichhorn
diff --git a/Models/ScheduleStatus.php b/Models/ScheduleStatus.php
index 9e746eb..7d457d8 100644
--- a/Models/ScheduleStatus.php
+++ b/Models/ScheduleStatus.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    Modules\Calendar\Models
  * @copyright  Dennis Eichhorn
diff --git a/Theme/Backend/Components/Calendar/BaseView.php b/Theme/Backend/Components/Calendar/BaseView.php
index 403f3a4..84f676f 100644
--- a/Theme/Backend/Components/Calendar/BaseView.php
+++ b/Theme/Backend/Components/Calendar/BaseView.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/Components/Event/BaseView.php b/Theme/Backend/Components/Event/BaseView.php
index 07d48b6..1ba9396 100644
--- a/Theme/Backend/Components/Event/BaseView.php
+++ b/Theme/Backend/Components/Event/BaseView.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/Navigation.en.lang.php b/Theme/Backend/Lang/Navigation.en.lang.php
index c70006a..b248927 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/api.en.lang.php b/Theme/Backend/Lang/api.en.lang.php
index 306d9c6..1afe44f 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 7.2
+ * 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 9cc3f2f..d672fe6 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/dashboard-calendar.tpl.php b/Theme/Backend/dashboard-calendar.tpl.php
index 5014378..68e182b 100644
--- a/Theme/Backend/dashboard-calendar.tpl.php
+++ b/Theme/Backend/dashboard-calendar.tpl.php
@@ -2,7 +2,7 @@
 /**
  * Orange Management
  *
- * PHP Version 7.2
+ * PHP Version 7.4
  *
  * @package    TBD
  * @copyright  Dennis Eichhorn