MathJax on vlfeat.org is broken due to http/https Mixed Content

[MathFoliage]

Until recently the mathjax worked fine on pages like this one: https://www.vlfeat.org/api/fisher-fundamentals.html

Now it's not being rendered because

Mixed Content: The page at 'https://www.vlfeat.org/api/fisher-fundamentals.html' was loaded over HTTPS, but requested an insecure script 'http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'. This request has been blocked; the content must be served over HTTPS.

the url needs to be changed to https