diff --git a/doc/conf.py b/doc/conf.py
index 0a83d80a..0727e2f2 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -241,7 +241,7 @@
 
 
 # Example configuration for intersphinx: refer to the Python standard library.
-intersphinx_mapping = {"http://docs.python.org/": None}
+intersphinx_mapping = {"http://docs.python.org/3": None}
 autodoc_default_flags = [
     "members",
     "show-inheritance",