https://bugs.gentoo.org/823095
--- a/doc/usage/configuration.rst
+++ b/doc/usage/configuration.rst
@@ -2650,8 +2650,8 @@
      A regular expression that matches a URI.
    *auth_info*
      Authentication information to use for that URI. The value can be anything
-     that is understood by the ``requests`` library (see :ref:`requests
-     Authentication <requests:authentication>` for details).
+     that is understood by the ``requests`` library (see `requests
+     Authentication <https://docs.python-requests.org/en/master/user/authentication/#authentication>`_ for details).
 
    The ``linkcheck`` builder will use the first matching ``auth_info`` value
    it can find in the :confval:`linkcheck_auth` list, so values earlier in the