diff --git a/Lib/weakref.py b/Lib/weakref.py
index 5fa851d..a968139 100644
--- a/Lib/weakref.py
+++ b/Lib/weakref.py
@@ -2,7 +2,7 @@
 
 This module is an implementation of PEP 205:
 
-http://www.python.org/dev/peps/pep-0205/
+https://www.python.org/dev/peps/pep-0205/
 """
 
 # Naming convention: Variables named "wr" are weak reference objects;