diff --git a/sphinx/themes/basic/layout.html b/sphinx/themes/basic/layout.html
index d10f183e1..704754084 100644
--- a/sphinx/themes/basic/layout.html
+++ b/sphinx/themes/basic/layout.html
@@ -208,7 +208,7 @@
       {% trans last_updated=last_updated|e %}Last updated on {{ last_updated }}.{% endtrans %}
     {%- endif %}
     {%- if show_sphinx %}
-      {% trans sphinx_version=sphinx_version|e %}Created using <a href="http://sphinx-doc.org/">Sphinx</a> {{ sphinx_version }}.{% endtrans %}
+      {% trans sphinx_version=sphinx_version|e %}Created using <a href="https://www.sphinx-doc.org/">Sphinx</a> {{ sphinx_version }}.{% endtrans %}
     {%- endif %}
     </div>
 {%- endblock %}