diff --git a/doc/doc-contrib-guide/source/rst-conv.rst b/doc/doc-contrib-guide/source/rst-conv.rst
index 7da5516da7..caf7ac5949 100644
--- a/doc/doc-contrib-guide/source/rst-conv.rst
+++ b/doc/doc-contrib-guide/source/rst-conv.rst
@@ -43,7 +43,7 @@ use simpler formatting.
 Useful links
 ~~~~~~~~~~~~
 
-* `Sphinx documentation <http://sphinx.readthedocs.org/en/latest/rest.html>`_
+* `Sphinx documentation <https://www.sphinx-doc.org/en/master/usage/restructuredtext/index.html>`_
 * `reStructuredText: Markup Syntax and Parser Component of Docutils
   <http://docutils.sourceforge.net/rst.html>`_
 * `Quick reStructuredText <http://docutils.sourceforge.net/docs/user/rst/quickref.html>`_