diff --git a/src/danog/MadelineProto/Lua.php b/src/danog/MadelineProto/Lua.php
index 517eeeb1..8d7578ab 100644
--- a/src/danog/MadelineProto/Lua.php
+++ b/src/danog/MadelineProto/Lua.php
@@ -53,6 +53,9 @@ class Lua
             $methods[$namespace][$method] = [$this->MadelineProto->{$namespace}, $method];
         }
         foreach ($this->MadelineProto->get_method_namespaces() as $namespace) {
+            if ($namespace === 'upload') {
+                continue;
+            }
             $this->{$namespace} = $methods[$namespace];
         }
     }
diff --git a/src/danog/MadelineProto/MTProtoTools/CallHandler.php b/src/danog/MadelineProto/MTProtoTools/CallHandler.php
index 336fdd8d..6636c7cf 100644
--- a/src/danog/MadelineProto/MTProtoTools/CallHandler.php
+++ b/src/danog/MadelineProto/MTProtoTools/CallHandler.php
@@ -43,7 +43,7 @@ trait CallHandler
         if (isset($args['ping_id']) && is_int($args['ping_id'])) {
             $args['ping_id'] = $this->pack_signed_long($args['ping_id']);
         }
-        if (isset($args['chat_id']) && !isset($args['peer']) && $method !== 'messages.discardEncryption' && (is_object($args['chat_id']) || $args['chat_id'] < 0)) {
+        if (isset($args['chat_id']) && !isset($args['peer']) && $method !== 'messages.discardEncryption' && (is_object($args['chat_id']) || $args['chat_id'] < 0 || !is_numeric($args['chat_id']))) {
             $res = $this->get_info($args['chat_id']);
             if ($res['type'] !== 'chat') {
                 throw new \danog\MadelineProto\Exception('chat_id is not a chat id!');