diff --git a/README b/README
index 2067578..aa3edc2 100644
--- a/README
+++ b/README
@@ -94,6 +94,7 @@ dictionary is::
                 'title': 'name of service,
                 'secret_key': '..', # base secret for Django applications or other needs
                 'base_url': 'base url of the service',
+                'saml-sp-metadata-url': '...',
                 'template_name': 'demo', # name of the template bundle to use
                 'variables': {
                     'variable-1': 'value-of-variable-1'