[cc-by-human]: https://creativecommons.org/licenses/by/4.0/
[cc-by-legal]: https://creativecommons.org/licenses/by/4.0/legalcode
-[mit-license]: http://opensource.org/licenses/mit-license.html
-[numfocus]: http://numfocus.org/
-[osi]: http://opensource.org
+[mit-license]: https://opensource.org/licenses/mit-license.html
+[numfocus]: https://numfocus.org/
+[osi]: https://opensource.org