diff --git a/README.md b/README.md
index aa1b457ff..6d254689e 100644
--- a/README.md
+++ b/README.md
@@ -394,6 +394,9 @@ Some have "dummy" values, fill them up if you want to enable these features (Pad
 # WebApp URL
 URL=http://app.mydomain.com
 
+# URL of the landing page linked from the app and emails (e.g. referral links); defaults to https://simplelogin.io
+LANDING_PAGE_URL=http://mydomain.com
+
 # domain used to create alias
 EMAIL_DOMAIN=mydomain.com
 
diff --git a/docs/ssl.md b/docs/ssl.md
index 1832aef96..f07e749a7 100644
--- a/docs/ssl.md
+++ b/docs/ssl.md
@@ -39,6 +39,7 @@ Make sure to replace app.mydomain.com with your own domain.
 ### Updating `simplelogin.env`
 
 Make sure to change the `URL` in `simplelogin.env` to `https://app.mydomain.com`, otherwise not all page assets will load securely, and some functionality (e.g. Webauthn) will break.
+If you set `LANDING_PAGE_URL`, update it to `https://mydomain.com` as well.
 You will need to reload the docker containers for this to take effect.
 
 ## HTTP Strict Transport Security (HSTS)