diff --git a/lib/api/marianumcloud/talk/chat/getChatResponse.dart b/lib/api/marianumcloud/talk/chat/getChatResponse.dart
index 7055417..cc83ea0 100644
--- a/lib/api/marianumcloud/talk/chat/getChatResponse.dart
+++ b/lib/api/marianumcloud/talk/chat/getChatResponse.dart
@@ -120,4 +120,5 @@ enum RichObjectStringObjectType {
   @JsonValue('guest') guest,
   @JsonValue('highlight') highlight,
   @JsonValue('talk-poll') talkPoll,
+  @JsonValue('geo-location') geoLocation,
 }
diff --git a/lib/api/marianumcloud/talk/chat/getChatResponse.g.dart b/lib/api/marianumcloud/talk/chat/getChatResponse.g.dart
index 9cfcf18..0087344 100644
--- a/lib/api/marianumcloud/talk/chat/getChatResponse.g.dart
+++ b/lib/api/marianumcloud/talk/chat/getChatResponse.g.dart
@@ -113,4 +113,5 @@ const _$RichObjectStringObjectTypeEnumMap = {
   RichObjectStringObjectType.guest: 'guest',
   RichObjectStringObjectType.highlight: 'highlight',
   RichObjectStringObjectType.talkPoll: 'talk-poll',
+  RichObjectStringObjectType.geoLocation: 'geo-location',
 };
diff --git a/lib/view/pages/talk/chatDetails/participants/participantsListView.dart b/lib/view/pages/talk/chatDetails/participants/participantsListView.dart
index db25cb7..dfb6b82 100644
--- a/lib/view/pages/talk/chatDetails/participants/participantsListView.dart
+++ b/lib/view/pages/talk/chatDetails/participants/participantsListView.dart
@@ -13,8 +13,11 @@ class ParticipantsListView extends StatelessWidget {
     lastname(participant) => participant.displayName.toString().split(' ').last;
     
     final participants = participantsResponse.data
-        .sorted((a, b) => lastname(a).compareTo(lastname(b)))
-        .sorted((a, b) => a.participantType.index.compareTo(b.participantType.index));
+        .sorted((a, b) {
+          final typeComparison = a.participantType.index.compareTo(b.participantType.index);
+          if (typeComparison != 0) return typeComparison;
+          return lastname(a).compareTo(lastname(b));
+        });
     var groupedParticipants = participants.groupListsBy((participant) => participant.participantType);
 
     return Scaffold(
@@ -27,7 +30,7 @@ class ParticipantsListView extends StatelessWidget {
             children: [
               ListTile(
                 title: Text(entry.key.prettyName),
-                titleTextStyle: TextStyle(fontWeight: FontWeight.bold),
+                titleTextStyle: Theme.of(context).textTheme.titleMedium
               ),
               ...entry.value.map((participant) => ListTile(
                 leading: UserAvatar(id: participant.actorId),