diff --git a/td b/td
index 7eba198..e531ae2 160000
--- a/td
+++ b/td
@@ -1 +1 @@
-Subproject commit 7eba19887ad834fd731b6b07b53c2426fe4beb59
+Subproject commit e531ae2eb01d5c0ba2a195c8d860a4e53689a729
diff --git a/telegram-bot-api/Client.cpp b/telegram-bot-api/Client.cpp
index 1392038..be31e0e 100644
--- a/telegram-bot-api/Client.cpp
+++ b/telegram-bot-api/Client.cpp
@@ -2024,6 +2024,12 @@ void Client::JsonMessage::store(JsonValueScope *scope) const {
       }
       break;
     }
+    case td_api::messageForumTopicIsHiddenToggled::ID: {
+      // auto content = static_cast<const td_api::messageForumTopicIsHiddenToggled *>(message_->content.get());
+      // temporary; the topic is closed when it is hidden or unhidden
+      object("forum_topic_closed", JsonForumTopicIsClosedToggled());
+      break;
+    }
     case td_api::messagePinMessage::ID: {
       auto content = static_cast<const td_api::messagePinMessage *>(message_->content.get());
       auto message_id = content->message_id_;
@@ -8259,11 +8265,14 @@ td::Status Client::process_edit_forum_topic_query(PromisedQueryPtr &query) {
   auto chat_id = query->arg("chat_id");
   auto message_thread_id = get_message_id(query.get(), "message_thread_id");
   auto name = query->arg("name");
+  auto edit_icon_custom_emoji_id = query->has_arg("icon_custom_emoji_id");
   auto icon_custom_emoji_id = td::to_integer<int64>(query->arg("icon_custom_emoji_id"));
 
   check_chat(chat_id, AccessRights::Write, std::move(query),
-             [this, message_thread_id, name = name.str(), icon_custom_emoji_id](int64 chat_id, PromisedQueryPtr query) {
-               send_request(make_object<td_api::editForumTopic>(chat_id, message_thread_id, name, icon_custom_emoji_id),
+             [this, message_thread_id, name = name.str(), edit_icon_custom_emoji_id, icon_custom_emoji_id](
+                 int64 chat_id, PromisedQueryPtr query) {
+               send_request(make_object<td_api::editForumTopic>(chat_id, message_thread_id, name,
+                                                                edit_icon_custom_emoji_id, icon_custom_emoji_id),
                             td::make_unique<TdOnOkQueryCallback>(std::move(query)));
              });
   return Status::OK();
@@ -8863,7 +8872,7 @@ td::Status Client::process_set_webhook_query(PromisedQueryPtr &query) {
   if (now > next_set_webhook_logging_time_ || webhook_url_ != new_url) {
     next_set_webhook_logging_time_ = now + 300;
     LOG(WARNING) << "Set webhook to " << new_url << ", max_connections = " << new_max_connections
-                 << ", IP address = " << new_ip_address;
+                 << ", IP address = " << new_ip_address << ", drop_pending_updates = " << drop_pending_updates;
   }
 
   if (!new_url.empty()) {
@@ -10125,7 +10134,9 @@ bool Client::need_skip_update_message(int64 chat_id, const object_ptr<td_api::me
       case td_api::messageVideoChatEnded::ID:
       case td_api::messageInviteVideoChatParticipants::ID:
       case td_api::messageForumTopicCreated::ID:
+      case td_api::messageForumTopicEdited::ID:
       case td_api::messageForumTopicIsClosedToggled::ID:
+      case td_api::messageForumTopicIsHiddenToggled::ID:
         // don't skip
         break;
       default:
diff --git a/telegram-bot-api/ClientManager.cpp b/telegram-bot-api/ClientManager.cpp
index 29efa83..2c44e6a 100644
--- a/telegram-bot-api/ClientManager.cpp
+++ b/telegram-bot-api/ClientManager.cpp
@@ -114,13 +114,13 @@ void ClientManager::send(PromisedQueryPtr query) {
         flood_control.add_limit(60, 20);        // 20 in a minute
         flood_control.add_limit(60 * 60, 600);  // 600 in an hour
       }
-      auto now = static_cast<td::uint32>(td::Time::now());
-      td::uint32 wakeup_at = flood_control.get_wakeup_at();
+      auto now = td::Time::now();
+      auto wakeup_at = flood_control.get_wakeup_at();
       if (wakeup_at > now) {
         LOG(INFO) << "Failed to create Client from IP address " << ip_address;
         return query->set_retry_after_error(static_cast<int>(wakeup_at - now) + 1);
       }
-      flood_control.add_event(static_cast<td::int32>(now));
+      flood_control.add_event(now);
     }
     auto tqueue_id = get_tqueue_id(user_id, query->is_test_dc());
     if (active_client_count_.count(tqueue_id) != 0) {
diff --git a/telegram-bot-api/HttpServer.h b/telegram-bot-api/HttpServer.h
index f7d0009..9699835 100644
--- a/telegram-bot-api/HttpServer.h
+++ b/telegram-bot-api/HttpServer.h
@@ -46,7 +46,7 @@ class HttpServer final : public td::TcpListener::Callback {
       set_timeout_at(wakeup_at);
       return;
     }
-    flood_control_.add_event(static_cast<td::int32>(now));
+    flood_control_.add_event(now);
     LOG(INFO) << "Create tcp listener " << td::tag("address", ip_address_) << td::tag("port", port_);
     listener_ = td::create_actor<td::TcpListener>(
         PSLICE() << "TcpListener" << td::tag("address", ip_address_) << td::tag("port", port_), port_,
diff --git a/telegram-bot-api/WebhookActor.cpp b/telegram-bot-api/WebhookActor.cpp
index f63cd55..4fd95d8 100644
--- a/telegram-bot-api/WebhookActor.cpp
+++ b/telegram-bot-api/WebhookActor.cpp
@@ -11,7 +11,6 @@
 #include "td/net/GetHostByNameActor.h"
 #include "td/net/HttpHeaderCreator.h"
 #include "td/net/HttpProxy.h"
-#include "td/net/SslStream.h"
 #include "td/net/TransparentProxy.h"
 
 #include "td/actor/actor.h"
@@ -136,12 +135,7 @@ td::Status WebhookActor::create_connection() {
   if (parameters_->webhook_proxy_ip_address_.is_valid()) {
     auto r_proxy_socket_fd = td::SocketFd::open(parameters_->webhook_proxy_ip_address_);
     if (r_proxy_socket_fd.is_error()) {
-      td::Slice error_message = "Can't connect to the webhook proxy";
-      auto error = td::Status::Error(PSLICE() << error_message << ": " << r_proxy_socket_fd.error());
-      VLOG(webhook) << error;
-      on_webhook_error(error_message);
-      on_error(td::Status::Error(error_message));
-      return error;
+      return create_webhook_error("Can't connect to the webhook proxy", r_proxy_socket_fd.move_as_error(), false);
     }
     if (!was_checked_) {
       TRY_STATUS(create_ssl_stream());  // check certificate
@@ -188,29 +182,40 @@ td::Status WebhookActor::create_connection() {
 
   auto r_fd = td::SocketFd::open(ip_address_);
   if (r_fd.is_error()) {
-    td::Slice error_message = "Can't connect to the webhook";
-    auto error = td::Status::Error(PSLICE() << error_message << ": " << r_fd.error());
-    VLOG(webhook) << error;
-    on_webhook_error(error_message);
-    on_error(r_fd.move_as_error());
-    return error;
+    return create_webhook_error("Can't connect to the webhook", r_fd.move_as_error(), false);
   }
   return create_connection(td::BufferedFd<td::SocketFd>(r_fd.move_as_ok()));
 }
 
+td::Status WebhookActor::create_webhook_error(td::Slice error_message, td::Status &&result, bool is_public) {
+  CHECK(result.is_error());
+  auto error = td::Status::Error(PSLICE() << error_message << ": " << result);
+  VLOG(webhook) << error;
+  if (is_public) {
+    on_webhook_error(PSLICE() << error_message << ": " << result.public_message());
+  } else {
+    on_webhook_error(error_message);
+  }
+  on_error(std::move(result));
+  return std::move(error);
+}
+
 td::Result<td::SslStream> WebhookActor::create_ssl_stream() {
   if (url_.protocol_ == td::HttpUrl::Protocol::Http) {
     return td::SslStream();
   }
 
-  auto r_ssl_stream = td::SslStream::create(url_.host_, cert_path_, td::SslStream::VerifyPeer::On, !cert_path_.empty());
+  if (!ssl_ctx_) {
+    auto r_ssl_ctx = td::SslCtx::create(cert_path_, td::SslCtx::VerifyPeer::On);
+    if (r_ssl_ctx.is_error()) {
+      return create_webhook_error("Can't create an SSL context", r_ssl_ctx.move_as_error(), true);
+    }
+    ssl_ctx_ = r_ssl_ctx.move_as_ok();
+  }
+
+  auto r_ssl_stream = td::SslStream::create(url_.host_, ssl_ctx_, !cert_path_.empty());
   if (r_ssl_stream.is_error()) {
-    td::Slice error_message = "Can't create an SSL connection";
-    auto error = td::Status::Error(PSLICE() << error_message << ": " << r_ssl_stream.error());
-    VLOG(webhook) << error;
-    on_webhook_error(PSLICE() << error_message << ": " << r_ssl_stream.error().public_message());
-    on_error(r_ssl_stream.move_as_error());
-    return std::move(error);
+    return create_webhook_error("Can't create an SSL connection", r_ssl_stream.move_as_error(), true);
   }
   return r_ssl_stream.move_as_ok();
 }
@@ -287,7 +292,7 @@ void WebhookActor::create_new_connections() {
                     << td::tag("after", td::format::as_time(wakeup_at - now));
       break;
     }
-    flood->add_event(static_cast<td::int32>(now));
+    flood->add_event(now);
     if (create_connection().is_error()) {
       relax_wakeup_at(now + 1.0, "create_new_connections error");
       return;
diff --git a/telegram-bot-api/WebhookActor.h b/telegram-bot-api/WebhookActor.h
index 28f5989..2538cc0 100644
--- a/telegram-bot-api/WebhookActor.h
+++ b/telegram-bot-api/WebhookActor.h
@@ -12,6 +12,7 @@
 
 #include "td/net/HttpOutboundConnection.h"
 #include "td/net/HttpQuery.h"
+#include "td/net/SslCtx.h"
 #include "td/net/SslStream.h"
 
 #include "td/actor/actor.h"
@@ -76,7 +77,7 @@ class WebhookActor final : public td::HttpOutboundConnection::Callback {
   bool tqueue_empty_ = false;
   std::size_t last_pending_update_count_ = MIN_PENDING_UPDATES_WARNING;
   td::HttpUrl url_;
-  td::string cert_path_;
+  const td::string cert_path_;
   std::shared_ptr<const ClientParameters> parameters_;
 
   double last_error_time_ = 0;
@@ -133,6 +134,7 @@ class WebhookActor final : public td::HttpOutboundConnection::Callback {
 
   double first_error_410_time_ = 0;
 
+  td::SslCtx ssl_ctx_;
   td::IPAddress ip_address_;
   td::int32 ip_generation_ = 0;
   double next_ip_address_resolve_time_ = 0;
@@ -176,6 +178,8 @@ class WebhookActor final : public td::HttpOutboundConnection::Callback {
   void resolve_ip_address();
   void on_resolved_ip_address(td::Result<td::IPAddress> r_ip_address);
 
+  td::Status create_webhook_error(td::Slice error_message, td::Status &&result, bool is_public);
+
   td::Result<td::SslStream> create_ssl_stream();
   td::Status create_connection() TD_WARN_UNUSED_RESULT;
   td::Status create_connection(td::BufferedFd<td::SocketFd> fd) TD_WARN_UNUSED_RESULT;