diff --git a/includes/Utils.php b/includes/Utils.php
index fbfc32a3..c17e0a18 100644
--- a/includes/Utils.php
+++ b/includes/Utils.php
@@ -200,7 +200,7 @@ public static function dateFormat($format, $dtStr = '', $tz = '', $offset = '')
      * @param mixed $format
      * @return string
      */
-    public static function timeFormat($timeString, $format = null)
+    public static function timeFormat($timeString, $format = 'H:i:s')
     {
         $output = null;
         if (empty($format)) {
diff --git a/rrze-calendar.php b/rrze-calendar.php
index 762367e1..cb7df1c7 100644
--- a/rrze-calendar.php
+++ b/rrze-calendar.php
@@ -4,7 +4,7 @@
 Plugin Name:     RRZE Calendar
 Plugin URI:      https://github.com/RRZE-Webteam/rrze-calendar
 Description:     Import and output of FAU public events.
-Version:         2.0.8
+Version:         2.0.9
 Author:          RRZE Webteam
 Author URI:      https://blogs.fau.de/webworking/
 License:         GNU General Public License v3.0
@@ -22,7 +22,7 @@
 use RRZE\WP\Plugin;
 
 const RRZE_PHP_VERSION = '8.0';
-const RRZE_WP_VERSION = '6.2';
+const RRZE_WP_VERSION = '6.3';
 
 // Autoloader
 require_once 'vendor/autoload.php';