diff --git a/SAML.md b/SAML.md
index d35f7b0..a26a9a3 100644
--- a/SAML.md
+++ b/SAML.md
@@ -13,6 +13,10 @@ Ruby on Rails OmniAuth, that has Shibboleth and SAML:
 - https://github.com/omniauth/omniauth/wiki/List-of-Strategies
 - https://github.com/omniauth/omniauth
 
+The SSO Wall of Shame:
+
+- https://sso.tax
+
 [SAML Issue](https://github.com/wekan/wekan/issues/708)
 
 [SAML settings commit](https://github.com/wekan/wekan/commit/214c86cc22f4c721a79ec0a4a4f3bbd90d673f93)