diff --git a/mail.md b/mail.md
index 32b5551871c..ceb50b8e42f 100644
--- a/mail.md
+++ b/mail.md
@@ -1093,6 +1093,8 @@ use Throwable;
 
 class OrderDelayed extends Mailable implements ShouldQueue
 {
+    use SerializesModels;
+
     /**
      * Handle a queued email's failure.
      */