8 files changed, 8 insertions, 10 deletions
diff --git a/vendor/sabre/vobject/composer.json b/vendor/sabre/vobject/composer.json
index b745b1fa6..b08684bce 100644
--- a/vendor/sabre/vobject/composer.json
+++ b/vendor/sabre/vobject/composer.json
@@ -34,7 +34,7 @@
     "require" : {
         "php"          : "^7.1 || ^8.0",
         "ext-mbstring" : "*",
-        "sabre/xml"    : "^2.1"
+        "sabre/xml"    : "^2.1 || ^3.0 || ^4.0"
     },
     "require-dev" : {
         "friendsofphp/php-cs-fixer": "~2.17.1",
diff --git a/vendor/sabre/vobject/lib/Component.php b/vendor/sabre/vobject/lib/Component.php
index a929387a3..ca82ad49b 100644
--- a/vendor/sabre/vobject/lib/Component.php
+++ b/vendor/sabre/vobject/lib/Component.php
@@ -368,7 +368,7 @@ class Component extends Node
      *
      * @param Xml\Writer $writer XML writer
      */
-    public function xmlSerialize(Xml\Writer $writer)
+    public function xmlSerialize(Xml\Writer $writer): void
     {
         $components = [];
         $properties = [];
diff --git a/vendor/sabre/vobject/lib/Component/VCard.php b/vendor/sabre/vobject/lib/Component/VCard.php
index 90a6df72f..82fab82bb 100644
--- a/vendor/sabre/vobject/lib/Component/VCard.php
+++ b/vendor/sabre/vobject/lib/Component/VCard.php
@@ -473,7 +473,7 @@ class VCard extends VObject\Document
      *
      * @param Xml\Writer $writer XML writer
      */
-    public function xmlSerialize(Xml\Writer $writer)
+    public function xmlSerialize(Xml\Writer $writer): void
     {
         $propertiesByGroup = [];
 
diff --git a/vendor/sabre/vobject/lib/Node.php b/vendor/sabre/vobject/lib/Node.php
index 2041b2ac7..852ffced0 100644
--- a/vendor/sabre/vobject/lib/Node.php
+++ b/vendor/sabre/vobject/lib/Node.php
@@ -82,7 +82,7 @@ abstract class Node implements \IteratorAggregate, \ArrayAccess, \Countable, \Js
      *
      * @param Xml\Writer $writer XML writer
      */
-    abstract public function xmlSerialize(Xml\Writer $writer);
+    abstract public function xmlSerialize(Xml\Writer $writer): void;
 
     /**
      * Call this method on a document if you're done using it.
diff --git a/vendor/sabre/vobject/lib/Parameter.php b/vendor/sabre/vobject/lib/Parameter.php
index c27b2aa47..0f0b5860c 100644
--- a/vendor/sabre/vobject/lib/Parameter.php
+++ b/vendor/sabre/vobject/lib/Parameter.php
@@ -334,7 +334,7 @@ class Parameter extends Node
      *
      * @param Xml\Writer $writer XML writer
      */
-    public function xmlSerialize(Xml\Writer $writer)
+    public function xmlSerialize(Xml\Writer $writer): void
     {
         foreach (explode(',', $this->value) as $value) {
             $writer->writeElement('text', $value);
diff --git a/vendor/sabre/vobject/lib/Parser/XML/Element/KeyValue.php b/vendor/sabre/vobject/lib/Parser/XML/Element/KeyValue.php
index c0bbf0d9b..e01772510 100644
--- a/vendor/sabre/vobject/lib/Parser/XML/Element/KeyValue.php
+++ b/vendor/sabre/vobject/lib/Parser/XML/Element/KeyValue.php
@@ -34,10 +34,8 @@ class KeyValue extends SabreXml\Element\KeyValue
      * the next element.
      *
      * @param XML\Reader $reader
-     *
-     * @return mixed
      */
-    public static function xmlDeserialize(SabreXml\Reader $reader)
+    public static function xmlDeserialize(SabreXml\Reader $reader): array
     {
         // If there's no children, we don't do anything.
         if ($reader->isEmptyElement) {
diff --git a/vendor/sabre/vobject/lib/Property.php b/vendor/sabre/vobject/lib/Property.php
index 56096dafe..f6550246a 100644
--- a/vendor/sabre/vobject/lib/Property.php
+++ b/vendor/sabre/vobject/lib/Property.php
@@ -318,7 +318,7 @@ abstract class Property extends Node
      *
      * @param Xml\Writer $writer XML writer
      */
-    public function xmlSerialize(Xml\Writer $writer)
+    public function xmlSerialize(Xml\Writer $writer): void
     {
         $parameters = [];
 
diff --git a/vendor/sabre/vobject/lib/Version.php b/vendor/sabre/vobject/lib/Version.php
index 92882f2f1..63349e47e 100644
--- a/vendor/sabre/vobject/lib/Version.php
+++ b/vendor/sabre/vobject/lib/Version.php
@@ -14,5 +14,5 @@ class Version
     /**
      * Full version number.
      */
-    const VERSION = '4.5.1';
+    public const VERSION = '4.5.3';
 }