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-rw-r--r--vendor/sabre/dav/lib/CardDAV/Plugin.php2
1 files changed, 1 insertions, 1 deletions
diff --git a/vendor/sabre/dav/lib/CardDAV/Plugin.php b/vendor/sabre/dav/lib/CardDAV/Plugin.php
index c2d31d9df..810ae3a1a 100644
--- a/vendor/sabre/dav/lib/CardDAV/Plugin.php
+++ b/vendor/sabre/dav/lib/CardDAV/Plugin.php
@@ -800,7 +800,7 @@ class Plugin extends DAV\ServerPlugin
*
* @return string
*/
- protected function convertVCard($data, $target, array $propertiesFilter = null)
+ protected function convertVCard($data, $target, ?array $propertiesFilter = null)
{
if (is_resource($data)) {
$data = stream_get_contents($data);