diff --git a/doc_src/conf.py b/doc_src/conf.py
index 4eba58e9d..9b1a139a1 100644
--- a/doc_src/conf.py
+++ b/doc_src/conf.py
@@ -2,9 +2,9 @@
 #
 # Configuration file for the Sphinx documentation builder.
 #
-# This file does only contain a selection of the most common options. For a
-# full list see the documentation:
-# http://www.sphinx-doc.org/en/master/config
+# This file only contains a selection of the most common options. For a full
+# list see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
 
 from glob import glob
 import os.path