diff --git a/roles/docker-wordpress/README.md b/roles/docker-wordpress/README.md
index 03a57482..e3780150 100644
--- a/roles/docker-wordpress/README.md
+++ b/roles/docker-wordpress/README.md
@@ -29,3 +29,4 @@ apt update && apt install nano && nano wp-config.php
 ## multiside
 - https://multilingualpress.de/doku/wordpress-multisite-installieren-einrichten/
 - https://pressable.com/knowledgebase/adding-or-changing-the-domain-on-a-wordpress-multisite/
+- https://wpengine.com/support/how-to-change-a-multi-site-primary-domain/