HTTPS-ifiy to some links
diff --git a/docs/installation.rst b/docs/installation.rst
index 2f97885..928ed4e 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -202,7 +202,7 @@
.. _`Homebrew`: http://brew.sh
-.. _`MacPorts`: http://www.macports.org
+.. _`MacPorts`: https://www.macports.org
.. _`32-bit`: https://jenkins.cryptography.io/job/openssl-win32-release/
.. _`64-bit`: https://jenkins.cryptography.io/job/openssl-win64-release/
.. _`bug in conda`: https://github.com/conda/conda-recipes/issues/110