Trivial: Update pypi url to new url
@@ -38,7 +38,7 @@ on how to enable manila on devstack.
Virtual environments
--------------------
-Manila development uses `virtualenv <http://pypi.python.org/pypi/virtualenv>`__ to track and manage Python
+Manila development uses `virtualenv <https://pypi.org/project/virtualenv/>`__ to track and manage Python
dependencies while in development and testing. This allows you to
install all of the Python package dependencies in a virtual
environment or "virtualenv" (a special subdirectory of your manila
