diff --git a/doc/conf.py b/doc/conf.py
index 5c4b3b89..a166dd70 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -341,4 +341,6 @@ texinfo_documents = [
 
 
 # Example configuration for intersphinx: refer to the Python standard library.
-intersphinx_mapping = {"https://docs.python.org/": None}
+intersphinx_mapping = {
+    'https://docs.python.org/': ('https://docs.python.org/3', None),
+}