diff --git a/plugins/kolab/KolabAddressBook.php b/plugins/kolab/KolabAddressBook.php
index 397bba9c5..7ade62c11 100644
--- a/plugins/kolab/KolabAddressBook.php
+++ b/plugins/kolab/KolabAddressBook.php
@@ -310,7 +310,7 @@ class KolabAddressBook implements \RainLoop\Providers\AddressBook\AddressBookInt
 		return $aResult;
 	}
 
-	public function GetContactByEmail(string $sEmail) : ?Contact;
+	public function GetContactByEmail(string $sEmail) : ?Contact
 	{
 		// TODO
 		return null;
diff --git a/plugins/kolab/index.php b/plugins/kolab/index.php
index fbabcedc8..be93fb382 100644
--- a/plugins/kolab/index.php
+++ b/plugins/kolab/index.php
@@ -4,8 +4,8 @@ class KolabPlugin extends \RainLoop\Plugins\AbstractPlugin
 {
 	const
 		NAME = 'Kolab',
-		VERSION = '2.3',
-		RELEASE  = '2022-12-30',
+		VERSION = '2.4',
+		RELEASE  = '2023-01-03',
 		CATEGORY = 'Contacts',
 		DESCRIPTION = 'Use an Address Book of Kolab.',
 		REQUIRED = '2.24.4';