Non HTTP Request for Twiiter Widget

Hi I’m using GB 3.1.20 and getting this after converting site to HTTPS:

Blocked loading mixed active content “http://platform.twitter.com/widgets.js?_=1469582749069”

URL is https://lighthousetreatment.com/photo-gallery/

I assume I can just change the request to HTTPS somewhere? Can you direct me where to change this in the source?

Thanks!
Jim

https://wordpress.org/plugins/gallery-bank/