diff --git a/docs/conf.py b/docs/conf.py
index dad4e608f..124f0f9ad 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -314,6 +314,6 @@ texinfo_documents = [
 
 
 intersphinx_mapping = {
-    'python': ('https://docs.python.org/': None),
+    'python': ('https://docs.python.org/', None),
     'acme': ('https://acme-python.readthedocs.org', None),
 }