We are trying to setup ADSelfService on AWS. ADSelfService installed on EC2 instance and we put AWS ELB (Classic) in front of the instance. This ELB is only used to serve https from user to adss.

However on login page we get problem where captcha image url is using http instead of https so browser does not load this image and give warning of mixed content.

Are there any settings that we have to do for this kind of setup so all URL from ADSelfService is https? Thank you in advance.