diff --git a/source/includes/common-minio-external-auth.rst b/source/includes/common-minio-external-auth.rst
index 44a8ece4..83da7a62 100644
--- a/source/includes/common-minio-external-auth.rst
+++ b/source/includes/common-minio-external-auth.rst
@@ -299,11 +299,12 @@ Defaults to ``off``.
 
 .. start-minio-ad-ldap-server-starttls
 
-Specify ``on`` to enable 
-`StartTLS <https://ldapwiki.com/wiki/StartTLS>`__ connections to AD/LDAP server.
+Specify ``on`` to enable ``StartTLS`` connections to an AD/LDAP server.
 
 Defaults to ``off``
 
+For more about ``StartTLS``, refer to section 4.14 of the `LDAP RFC 4511 specification <https://docs.ldap.com/specs/rfc4511.txt>`__.
+
 .. end-minio-ad-ldap-server-starttls
 
 .. start-minio-ad-ldap-srv_record_name