diff --git a/lib/utils/matrix_sdk_extensions/matrix_locals.dart b/lib/utils/matrix_sdk_extensions/matrix_locals.dart
index fdf2030d..4fb461fa 100644
--- a/lib/utils/matrix_sdk_extensions/matrix_locals.dart
+++ b/lib/utils/matrix_sdk_extensions/matrix_locals.dart
@@ -308,4 +308,7 @@ class MatrixLocals extends MatrixLocalizations {
   @override
   String wasDirectChatDisplayName(String oldDisplayName) =>
       l10n.wasDirectChatDisplayName(oldDisplayName);
+
+  //@override
+  String get unknownUser => l10n.user;
 }
diff --git a/lib/utils/voip_plugin.dart b/lib/utils/voip_plugin.dart
index 65ad9370..5d77c887 100644
--- a/lib/utils/voip_plugin.dart
+++ b/lib/utils/voip_plugin.dart
@@ -118,7 +118,7 @@ class VoipPlugin with WidgetsBindingObserver implements WebRTCDelegate {
       kIsWeb ? false : await CallKeepManager().hasPhoneAccountEnabled;
 
   @override
-  void playRingtone() async {
+  Future<void> playRingtone() async {
     if (!background && !await hasCallingAccount) {
       try {
         await UserMediaManager().startRingingTone();
@@ -127,7 +127,7 @@ class VoipPlugin with WidgetsBindingObserver implements WebRTCDelegate {
   }
 
   @override
-  void stopRingtone() async {
+  Future<void> stopRingtone() async {
     if (!background && !await hasCallingAccount) {
       try {
         await UserMediaManager().stopRingingTone();
@@ -136,7 +136,7 @@ class VoipPlugin with WidgetsBindingObserver implements WebRTCDelegate {
   }
 
   @override
-  void handleNewCall(CallSession call) async {
+  Future<void> handleNewCall(CallSession call) async {
     if (PlatformInfos.isAndroid) {
       // probably works on ios too
       final hasCallingAccount = await CallKeepManager().hasPhoneAccountEnabled;
@@ -184,7 +184,7 @@ class VoipPlugin with WidgetsBindingObserver implements WebRTCDelegate {
   }
 
   @override
-  void handleCallEnded(CallSession session) async {
+  Future<void> handleCallEnded(CallSession session) async {
     if (overlayEntry != null) {
       overlayEntry!.remove();
       overlayEntry = null;
@@ -198,12 +198,12 @@ class VoipPlugin with WidgetsBindingObserver implements WebRTCDelegate {
   }
 
   @override
-  void handleGroupCallEnded(GroupCall groupCall) {
+  Future<void> handleGroupCallEnded(GroupCall groupCall) async {
     // TODO: implement handleGroupCallEnded
   }
 
   @override
-  void handleNewGroupCall(GroupCall groupCall) {
+  Future<void> handleNewGroupCall(GroupCall groupCall) async {
     // TODO: implement handleNewGroupCall
   }
 
@@ -213,7 +213,7 @@ class VoipPlugin with WidgetsBindingObserver implements WebRTCDelegate {
       voip.currentCID == null && voip.currentGroupCID == null;
 
   @override
-  void handleMissedCall(CallSession session) {
+  Future<void> handleMissedCall(CallSession session) async {
     // TODO: implement handleMissedCall
   }
 }
diff --git a/pubspec.lock b/pubspec.lock
index 89ebe6b0..3d66952d 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -1139,10 +1139,10 @@ packages:
     dependency: "direct main"
     description:
       name: matrix
-      sha256: "9e661004d56e176bf5e6ea30cc517e41392d36eccd8af4b0a9bc5a982def2552"
+      sha256: "8c07fa7b558d28891ea2609542295e4bb3e8360545540b434abaf055dde3a59c"
       url: "https://pub.dev"
     source: hosted
-    version: "0.17.1"
+    version: "0.18.0"
   matrix_api_lite:
     dependency: transitive
     description:
diff --git a/pubspec.yaml b/pubspec.yaml
index b68c661a..ef418019 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -57,7 +57,7 @@ dependencies:
   just_audio_mpv: ^0.1.6
   keyboard_shortcuts: ^0.1.4
   latlong2: ^0.8.1
-  matrix: ^0.17.1
+  matrix: ^0.18.0
   matrix_homeserver_recommendations: ^0.3.0
   matrix_link_text: ^1.0.2
   native_imaging: ^0.1.0