diff --git a/src/Transport/SmtpOptions.php b/src/Transport/SmtpOptions.php
index 0af488e0..cf77f261 100644
--- a/src/Transport/SmtpOptions.php
+++ b/src/Transport/SmtpOptions.php
@@ -163,6 +163,7 @@ public function getHost()
     public function setHost($host)
     {
         $this->host = (string) $host;
+        return $this;
     }
 
     /**