diff --git a/docs/source/deploy.rst b/docs/source/deploy.rst
index d9ce7a014..78b9423fd 100644
--- a/docs/source/deploy.rst
+++ b/docs/source/deploy.rst
@@ -291,4 +291,4 @@ utility::
 .. _`logging configuration file`: https://github.com/benoitc/gunicorn/blob/master/examples/logging.conf
 .. _Virtualenv: http://pypi.python.org/pypi/virtualenv
 .. _Systemd: http://www.freedesktop.org/wiki/Software/systemd
-.. _Gaffer <http://gaffer.readthedocs.org/en/latest/index.html>:
+.. _Gaffer <https://gaffer.readthedocs.io/en/latest/index.html>: