diff --git a/README.md b/README.md
index 499c6059..5ae4675f 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,7 @@ addon | version | summary
 [mail_optional_autofollow](mail_optional_autofollow/) | 9.0.1.0.0 | Choose if you want to automatically add new recipients as followers on mail.compose.message
 [mail_tracking](mail_tracking/) | 9.0.3.0.1 | Email tracking system for all mails sent
 [mail_tracking_mailgun](mail_tracking_mailgun/) | 9.0.1.0.0 | Mail tracking and Mailgun webhooks integration
+[mass_mailing_security_group](mass_mailing_security_group/) | 9.0.1.0.0 | Mass mailing security group
 
 Unported addons
 ---------------