diff --git a/toxygen/contacts/contact_menu.py b/toxygen/contacts/contact_menu.py
index ff6a9ed..6a2eb86 100644
--- a/toxygen/contacts/contact_menu.py
+++ b/toxygen/contacts/contact_menu.py
@@ -181,6 +181,9 @@ class GroupMenuGenerator(BaseContactMenuGenerator):
         menu = (builder
                 .with_action(util_ui.tr('Set alias'), lambda: main_screen.set_alias(number))
                 .with_submenu(copy_menu_builder)
+                .with_optional_action(util_ui.tr('Set topic'),
+                                      lambda: groups_service.set_group_topic(self._contact),
+                                      self._contact.is_moderator_or_founder())
                 .with_action(util_ui.tr('Reconnect to group'),
                              lambda: groups_service.reconnect_to_group(self._contact.number))
                 .with_optional_action(util_ui.tr('Disconnect from group'),
diff --git a/toxygen/contacts/group_chat.py b/toxygen/contacts/group_chat.py
index b18fb14..fac2165 100644
--- a/toxygen/contacts/group_chat.py
+++ b/toxygen/contacts/group_chat.py
@@ -33,6 +33,12 @@ class GroupChat(contact.Contact, ToxSave):
     def get_self_name(self):
         return self._peers[0].name
 
+    def get_self_role(self):
+        return self._peers[0].role
+
+    def is_moderator_or_founder(self):
+        return self.get_self_role() <= constants.TOX_GROUP_ROLE['MODERATOR']
+
     def add_peer(self, peer_id, is_current_user=False):
         peer = GroupChatPeer(peer_id,
                              self._tox.group_peer_get_name(self._number, peer_id),
diff --git a/toxygen/groups/groups_service.py b/toxygen/groups/groups_service.py
index 2c0d4c3..1a8ccc0 100644
--- a/toxygen/groups/groups_service.py
+++ b/toxygen/groups/groups_service.py
@@ -76,6 +76,17 @@ class GroupsService(tox_save.ToxSave):
         group.name = self._tox.group_get_name(group.number)
         group.status_message = self._tox.group_get_topic(group.number)
 
+    def set_group_topic(self, group):
+        if not group.is_moderator_or_founder():
+            return
+        text = util_ui.tr('New topic for group {}:'.format(group.name))
+        title = util_ui.tr('Set group topic')
+        topic, ok = util_ui.text_dialog(text, title, group.status_message)
+        if not ok or not topic:
+            return
+        self._tox.group_set_topic(group.number, topic)
+        group.status_message = topic
+
     # -----------------------------------------------------------------------------------------------------------------
     # Peers list
     # -----------------------------------------------------------------------------------------------------------------
diff --git a/toxygen/middleware/callbacks.py b/toxygen/middleware/callbacks.py
index 513cdd2..8730b54 100644
--- a/toxygen/middleware/callbacks.py
+++ b/toxygen/middleware/callbacks.py
@@ -399,6 +399,7 @@ def group_peer_join(contacts_provider, groups_service):
         group = contacts_provider.get_group_by_number(group_number)
         group.add_peer(peer_id)
         invoke_in_main_thread(groups_service.generate_peers_list)
+        invoke_in_main_thread(groups_service.update_group_info, group)
 
     return wrapped
 
diff --git a/toxygen/wrapper/tox.py b/toxygen/wrapper/tox.py
index fc438d8..836d38c 100644
--- a/toxygen/wrapper/tox.py
+++ b/toxygen/wrapper/tox.py
@@ -1851,6 +1851,7 @@ class Tox:
         """
 
         error = c_int()
+        topic = bytes(topic, 'utf-8')
         result = Tox.libtoxcore.tox_group_set_topic(self._tox_pointer, group_number, topic, len(topic), byref(error))
         return result