Use https:// URLs when referring to python.org hosts.
diff --git a/Doc/library/index.rst b/Doc/library/index.rst
index 277feb1..ac7ab91 100644
--- a/Doc/library/index.rst
+++ b/Doc/library/index.rst
@@ -30,7 +30,7 @@
In addition to the standard library, there is a growing collection of
several thousand components (from individual programs and modules to
packages and entire application development frameworks), available from
-the `Python Package Index <http://pypi.python.org/pypi>`_.
+the `Python Package Index <https://pypi.python.org/pypi>`_.
.. toctree::