diff --git a/td/generate/scheme/td_api.tl b/td/generate/scheme/td_api.tl
index a65917526..d976c7cd2 100644
--- a/td/generate/scheme/td_api.tl
+++ b/td/generate/scheme/td_api.tl
@@ -6592,7 +6592,7 @@ sendWebAppData bot_user_id:int53 button_text:string data:string = Ok;
 
 //@description Informs TDLib that a Web App is being opened from attachment menu, a botMenuButton button, an internalLinkTypeAttachmentMenuBot link, or an inlineKeyboardButtonTypeWebApp button.
 //-For each bot, a confirmation alert about data sent to the bot must be shown once
-//@chat_id Identifier of the chat in which the Web App is opened
+//@chat_id Identifier of the chat in which the Web App is opened. The Web App can't be opened in secret chats
 //@bot_user_id Identifier of the bot, providing the Web App
 //@url The URL from an inlineKeyboardButtonTypeWebApp button, a botMenuButton button, or an internalLinkTypeAttachmentMenuBot link, or an empty string otherwise
 //@theme Preferred Web App theme; pass null to use the default theme
diff --git a/td/telegram/AttachMenuManager.cpp b/td/telegram/AttachMenuManager.cpp
index c8277ff4d..dde4ed5cd 100644
--- a/td/telegram/AttachMenuManager.cpp
+++ b/td/telegram/AttachMenuManager.cpp
@@ -748,7 +748,8 @@ void AttachMenuManager::request_app_web_view(DialogId dialog_id, UserId bot_user
                                              string &&start_parameter,
                                              const td_api::object_ptr<td_api::themeParameters> &theme,
                                              string &&platform, bool allow_write_access, Promise<string> &&promise) {
-  if (!td_->messages_manager_->have_input_peer(dialog_id, AccessRights::Read)) {
+  if (!td_->messages_manager_->have_input_peer(dialog_id, AccessRights::Read) ||
+      dialog_id.get_type() == DialogType::SecretChat) {
     dialog_id = DialogId(bot_user_id);
   }
   TRY_RESULT_PROMISE(promise, input_user, td_->contacts_manager_->get_input_user(bot_user_id));
diff --git a/td/telegram/CallbackQueriesManager.cpp b/td/telegram/CallbackQueriesManager.cpp
index 6be225372..3e6c4cb12 100644
--- a/td/telegram/CallbackQueriesManager.cpp
+++ b/td/telegram/CallbackQueriesManager.cpp
@@ -253,6 +253,9 @@ void CallbackQueriesManager::send_callback_query(FullMessageId full_message_id,
   if (!full_message_id.get_message_id().is_server()) {
     return promise.set_error(Status::Error(400, "Bad message identifier"));
   }
+  if (dialog_id.get_type() == DialogType::SecretChat) {
+    return promise.set_error(Status::Error(400, "Secret chat messages can't have callback buttons"));
+  }
 
   if (payload->get_id() == td_api::callbackQueryPayloadDataWithPassword::ID) {
     auto password = static_cast<const td_api::callbackQueryPayloadDataWithPassword *>(payload.get())->password_;
diff --git a/td/telegram/ContactsManager.cpp b/td/telegram/ContactsManager.cpp
index 9022f93a3..45d6419c8 100644
--- a/td/telegram/ContactsManager.cpp
+++ b/td/telegram/ContactsManager.cpp
@@ -8187,6 +8187,7 @@ void ContactsManager::report_channel_spam(ChannelId channel_id, const vector<Mes
     }
 
     auto sender_dialog_id = td_->messages_manager_->get_dialog_message_sender({DialogId(channel_id), message_id});
+    CHECK(sender_dialog_id.get_type() != DialogType::SecretChat);
     if (sender_dialog_id.is_valid() && sender_dialog_id != DialogId(get_my_id()) &&
         td_->messages_manager_->have_input_peer(sender_dialog_id, AccessRights::Know)) {
       server_message_ids[sender_dialog_id].push_back(message_id);
diff --git a/td/telegram/GameManager.cpp b/td/telegram/GameManager.cpp
index 1ed642ba6..879451d74 100644
--- a/td/telegram/GameManager.cpp
+++ b/td/telegram/GameManager.cpp
@@ -266,7 +266,7 @@ void GameManager::get_game_high_scores(FullMessageId full_message_id, UserId use
     return promise.set_error(Status::Error(400, "Can't access the chat"));
   }
   auto message_id = full_message_id.get_message_id();
-  if (message_id.is_scheduled() || !message_id.is_server()) {
+  if (message_id.is_scheduled() || !message_id.is_server() || dialog_id.get_type() == DialogType::SecretChat) {
     return promise.set_error(Status::Error(400, "Wrong message identifier specified"));
   }