Sorry for veering off the template -- this is a bug report for the GitHub Pages configuration of this repo itself, rather than the software project.
GitHub now lets you enforce HTTPS for *.github.io domains:
https://github.com/blog/2186-https-for-github-pages
The site already works over HTTPS without errors: https://harvesthq.github.io/chosen/ So this should be a trivial fix.
I recommend going through any other repos that use the harvesthq.github.io domain to flip the switch there too.

You got it! Checked the box like a champ, but the site still seems accessible over HTTP — perhaps the next build will fix it, or perhaps it takes some time — in any case, going to mark this as ✅ !
Thanks for keepin’ an eye out, @konklone!
http://harvesthq.github.io/chosen/ redirects to HTTPS for me:
$ curl --head http://harvesthq.github.io/chosen/
HTTP/1.1 301 Moved Permanently
Server: GitHub.com
Content-Type: text/html
Location: https://harvesthq.github.io/chosen/
Thanks for doing this! :smiley_cat:
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You got it! Checked the box like a champ, but the site still seems accessible over HTTP — perhaps the next build will fix it, or perhaps it takes some time — in any case, going to mark this as ✅ !
Thanks for keepin’ an eye out, @konklone!