HTTPS some links, in the odd event users of a cryptographic library would care about authentication, integrity, or confidentiality
diff --git a/docs/installation.rst b/docs/installation.rst
index 1804989..8c3c436 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -268,7 +268,7 @@
.. _`MacPorts`: https://www.macports.org
.. _`openssl-release`: https://jenkins.cryptography.io/job/openssl-release/
.. _`bug in conda`: https://github.com/conda/conda-recipes/issues/110
-.. _`Greg Wilson's blog post`: http://software-carpentry.org/blog/2014/04/mr-biczo-was-right.html
+.. _`Greg Wilson's blog post`: https://software-carpentry.org/blog/2014/04/mr-biczo-was-right.html
.. _virtualenv: https://virtualenv.pypa.io/en/latest/
.. _openssl.org: https://openssl.org/source/
.. _`wheel cache`: https://pip.pypa.io/en/stable/reference/pip_install/#caching