diff --git a/td/telegram/MessagesManager.cpp b/td/telegram/MessagesManager.cpp
index 62ceed31..36fbc13e 100644
--- a/td/telegram/MessagesManager.cpp
+++ b/td/telegram/MessagesManager.cpp
@@ -4476,6 +4476,9 @@ MessagesManager::MessagesManager(Td *td, ActorShared<> parent) : td_(td), parent
   pending_unload_dialog_timeout_.set_callback(on_pending_unload_dialog_timeout_callback);
   pending_unload_dialog_timeout_.set_callback_data(static_cast<void *>(this));
 
+  dialog_unmute_timeout_.set_callback(on_dialog_unmute_timeout_callback);
+  dialog_unmute_timeout_.set_callback_data(static_cast<void *>(this));
+
   sequence_dispatcher_ = create_actor<MultiSequenceDispatcher>("multi sequence dispatcher");
 
   if (G()->parameters().use_message_db) {
@@ -4565,6 +4568,16 @@ void MessagesManager::on_pending_unload_dialog_timeout_callback(void *messages_m
   messages_manager->unload_dialog(DialogId(dialog_id_int));
 }
 
+void MessagesManager::on_dialog_unmute_timeout_callback(void *messages_manager_ptr, int64 dialog_id_int) {
+  if (G()->close_flag()) {
+    return;
+  }
+
+  auto messages_manager = static_cast<MessagesManager *>(messages_manager_ptr);
+  send_closure_later(messages_manager->actor_id(messages_manager), &MessagesManager::on_dialog_unmute,
+                     DialogId(dialog_id_int));
+}
+
 BufferSlice MessagesManager::get_dialog_database_value(const Dialog *d) {
   // can't use log_event_store, because it tries to parse stored Dialog
   LogEventStorerCalcLength storer_calc_length;
@@ -5869,12 +5882,13 @@ bool MessagesManager::update_notification_settings(NotificationSettingsScope sco
       DialogId dialog_id(scope);
       CHECK(dialog_id.is_valid());
       CHECK(have_dialog(dialog_id)) << "Wrong " << dialog_id << " in update_notification_settings";
+      update_dialog_unmute_timeout(dialog_id, current_settings->mute_until, new_settings.mute_until);
       on_dialog_updated(dialog_id, "update_notification_settings");
     } else {
       string key = get_notification_settings_scope_database_key(scope);
       G()->td_db()->get_binlog_pmc()->set(key, log_event_store(new_settings).as_slice().str());
     }
-    LOG(INFO) << "Update notification settings in " << scope;
+    LOG(INFO) << "Update notification settings in " << scope << " from " << *current_settings << " to " << new_settings;
     *current_settings = new_settings;
 
     if (need_update) {
@@ -5887,6 +5901,45 @@ bool MessagesManager::update_notification_settings(NotificationSettingsScope sco
   return is_changed;
 }
 
+void MessagesManager::update_dialog_unmute_timeout(DialogId dialog_id, int32 old_mute_until, int32 new_mute_until) {
+  if (old_mute_until == new_mute_until) {
+    return;
+  }
+
+  auto now = G()->unix_time_cached();
+  if (new_mute_until >= now && new_mute_until < now + 366 * 86400) {
+    dialog_unmute_timeout_.set_timeout_in(dialog_id.get(), new_mute_until - now + 1);
+  } else {
+    dialog_unmute_timeout_.cancel_timeout(dialog_id.get());
+  }
+}
+
+void MessagesManager::on_dialog_unmute(DialogId dialog_id) {
+  auto d = get_dialog(dialog_id);
+  CHECK(d != nullptr);
+
+  if (d->notification_settings.mute_until == 0) {
+    return;
+  }
+
+  auto now = G()->unix_time();
+  if (d->notification_settings.mute_until > now) {
+    LOG(ERROR) << "Failed to unmute " << dialog_id << " in " << now << ", will be unmuted in "
+               << d->notification_settings.mute_until;
+    update_dialog_unmute_timeout(dialog_id, -1, d->notification_settings.mute_until);
+    return;
+  }
+
+  LOG(INFO) << "Unmute " << dialog_id;
+  update_dialog_unmute_timeout(dialog_id, d->notification_settings.mute_until, 0);
+  d->notification_settings.mute_until = 0;
+  send_closure(G()->td(), &Td::send_update,
+               make_tl_object<td_api::updateNotificationSettings>(
+                   get_notification_settings_scope_object(NotificationSettingsScope(dialog_id.get())),
+                   get_notification_settings_object(&d->notification_settings)));
+  on_dialog_updated(dialog_id, "on_dialog_unmute");
+}
+
 void MessagesManager::on_update_notify_settings(
     NotificationSettingsScope scope, tl_object_ptr<telegram_api::PeerNotifySettings> &&peer_notify_settings) {
   const NotificationSettings notification_settings = get_notification_settings(std::move(peer_notify_settings));
@@ -22484,6 +22537,8 @@ void MessagesManager::fix_new_dialog(Dialog *d, unique_ptr<Message> &&last_datab
   CHECK(d != nullptr);
   auto dialog_id = d->dialog_id;
 
+  update_dialog_unmute_timeout(d->dialog_id, -1, d->notification_settings.mute_until);
+
   auto pending_it = pending_add_dialog_last_database_message_dependent_dialogs_.find(dialog_id);
   if (pending_it != pending_add_dialog_last_database_message_dependent_dialogs_.end()) {
     auto pending_dialogs = std::move(pending_it->second);
diff --git a/td/telegram/MessagesManager.h b/td/telegram/MessagesManager.h
index 59359766..8db59e46 100644
--- a/td/telegram/MessagesManager.h
+++ b/td/telegram/MessagesManager.h
@@ -674,6 +674,12 @@ class NotificationSettings {
   }
 };
 
+inline StringBuilder &operator<<(StringBuilder &string_builder, NotificationSettings notification_settings) {
+  return string_builder << "[" << notification_settings.mute_until << ", " << notification_settings.sound << ", "
+                        << notification_settings.show_preview << ", " << notification_settings.silent_send_message
+                        << ", " << notification_settings.is_synchronized << "]";
+}
+
 inline constexpr size_t search_messages_filter_size() {
   return static_cast<int32>(SearchMessagesFilter::Size) - 1;
 }
@@ -2133,6 +2139,10 @@ class MessagesManager : public Actor {
   bool update_notification_settings(NotificationSettingsScope scope, NotificationSettings *current_settings,
                                     const NotificationSettings &new_settings);
 
+  void update_dialog_unmute_timeout(DialogId dialog_id, int32 old_mute_until, int32 new_mute_until);
+
+  void on_dialog_unmute(DialogId dialog_id);
+
   Dialog *get_dialog_by_message_id(MessageId message_id);
 
   MessageId get_message_id_by_random_id(Dialog *d, int64 random_id);
@@ -2389,6 +2399,8 @@ class MessagesManager : public Actor {
 
   static void on_pending_unload_dialog_timeout_callback(void *messages_manager_ptr, int64 dialog_id_int);
 
+  static void on_dialog_unmute_timeout_callback(void *messages_manager_ptr, int64 dialog_id_int);
+
   void load_secret_thumbnail(FileId thumbnail_file_id);
 
   static tl_object_ptr<telegram_api::channelAdminLogEventsFilter> get_channel_admin_log_events_filter(
@@ -2630,6 +2642,7 @@ class MessagesManager : public Actor {
   MultiTimeout pending_draft_message_timeout_;
   MultiTimeout pending_updated_dialog_timeout_;
   MultiTimeout pending_unload_dialog_timeout_;
+  MultiTimeout dialog_unmute_timeout_;
 
   Hints dialogs_hints_;  // search dialogs by title and username