diff --git a/docs b/docs
index 8f6784ad..ddb2e4f7 160000
--- a/docs
+++ b/docs
@@ -1 +1 @@
-Subproject commit 8f6784adf5bca1dbab98ba1ec69ab52050633ca1
+Subproject commit ddb2e4f76938b69ceac6e4615901c642accae1ef
diff --git a/src/danog/MadelineProto/Connection.php b/src/danog/MadelineProto/Connection.php
index 32e62b46..c3eddd63 100644
--- a/src/danog/MadelineProto/Connection.php
+++ b/src/danog/MadelineProto/Connection.php
@@ -178,7 +178,7 @@ class Connection
         $message['send_promise'] = $deferred;
         $this->pending_outgoing[$this->pending_outgoing_key++] = $message;
         $this->pending_outgoing_key %= self::PENDING_MAX;
-        if ($flush) {
+        if ($flush && isset($this->writer)) {
             $this->writer->resume();
         }