diff --git a/docs b/docs
index e8e22ca1..0fcff8e5 160000
--- a/docs
+++ b/docs
@@ -1 +1 @@
-Subproject commit e8e22ca165ac1bc8a7435d5d55b3e94b1883d9d8
+Subproject commit 0fcff8e5a31af300511949c4dbafc7be6c0d4dd7
diff --git a/src/danog/MadelineProto/DataCenter.php b/src/danog/MadelineProto/DataCenter.php
index b504e127..c716851b 100644
--- a/src/danog/MadelineProto/DataCenter.php
+++ b/src/danog/MadelineProto/DataCenter.php
@@ -64,7 +64,7 @@ class DataCenter
         $this->dclist = $dclist;
         $this->settings = $settings;
         foreach ($this->sockets as $key => $socket) {
-            if ($socket instanceof Connection) {
+            if ($socket instanceof Connection && !strpos($key, '_bk')) {
                 $this->API->logger->logger(sprintf(\danog\MadelineProto\Lang::$current_lang['dc_con_stop'], $key), \danog\MadelineProto\Logger::VERBOSE);
                 $socket->old = true;
                 $socket->disconnect();
diff --git a/src/danog/MadelineProto/MTProto.php b/src/danog/MadelineProto/MTProto.php
index b96e1400..fd8bab08 100644
--- a/src/danog/MadelineProto/MTProto.php
+++ b/src/danog/MadelineProto/MTProto.php
@@ -336,7 +336,7 @@ class MTProto implements TLCallback
             }
 
             foreach ($this->full_chats as $id => $full) {
-                $this->full_chats[$id] = ['full' => $full['full'], 'last_update' => $full['last_update']];
+                if (isset($full['full'], $full['last_update'])) $this->full_chats[$id] = ['full' => $full['full'], 'last_update' => $full['last_update']];
             }
             foreach ($this->secret_chats as $key => &$chat) {
                 if (!is_array($chat)) {
diff --git a/src/danog/MadelineProto/Magic.php b/src/danog/MadelineProto/Magic.php
index 7c817c0c..de76c8d1 100644
--- a/src/danog/MadelineProto/Magic.php
+++ b/src/danog/MadelineProto/Magic.php
@@ -66,7 +66,7 @@ class Magic
                 throw new \danog\MadelineProto\Exception(hex2bin(\danog\MadelineProto\Lang::$current_lang['v_error']), 0, null, 'MadelineProto', 1);
             }
             if (class_exists('\\danog\\MadelineProto\\VoIP')) {
-                if (!defined('\\danog\\MadelineProto\\VoIP::PHP_LIBTGVOIP_VERSION') || !in_array(\danog\MadelineProto\VoIP::PHP_LIBTGVOIP_VERSION, ['1.2.0'])) {
+                if (!defined('\\danog\\MadelineProto\\VoIP::PHP_LIBTGVOIP_VERSION') || !in_array(\danog\MadelineProto\VoIP::PHP_LIBTGVOIP_VERSION, ['1.3.0'])) {
                     throw new \danog\MadelineProto\Exception(hex2bin(\danog\MadelineProto\Lang::$current_lang['v_tgerror']), 0, null, 'MadelineProto', 1);
                 }
             }