Google Maps plugin on Secure Site

Hello, we are running this website on https and the page with the map https://foothillsrehabcenter.com/contact-us/ will not validate as secure - I believe the issue is the map - any suggestions?

The site is not live but you can get to it initially by going to https://foothillsrehabcenter.com/checkitoutnow and then you will be able to navigate in preview mode.

Thanks