diff --git a/doc/src/conf.py b/doc/src/conf.py
index 6afb2869..297db5e4 100644
--- a/doc/src/conf.py
+++ b/doc/src/conf.py
@@ -61,8 +61,8 @@ except ImportError:
     release = version
 
 intersphinx_mapping = {
-    'py': ('http://docs.python.org/2', None),
-    'py3': ('http://docs.python.org/3', None),
+    'py': ('https://docs.python.org/2', None),
+    'py3': ('https://docs.python.org/3', None),
     }
 
 # Pattern to generate links to the bug tracker