Google Font not showing after changing

Hello. In the 'Fontsettings' tab of the template manager I changed the 'Font Family' for the paragraph section to Duru Sans and after the save settings nothing changed on the site after a page refresh. I changed to a different font family and the template did change to the other font. Is there something I should do in the index.php to enable a certain Google Font to work?

Thank you.

You need to include font source. There are 3 ways you can do it. Google can give you @import.. css you can just put in template_css.css at file beginning