Gadgets are not rendering for Https request

Our application was supporting only http, gadgets where getting rendered in Iframe without any issues using Shindig version 2.0, we have a new requirement to support https , as part this we made sure all the js, css, images that where internally called within gadget was changed to https, but still gadgets are not getting rendered within Iframe since some of the internal shindig api call like rpc calls are still in http and these are getting blocked.
http://sciverse-shindig.elsevier.com/gadgets/js/core:rpc.js?container=default&nocache=1&debug=0&c=0
Can you please guide us in resolving this issue ,
Migrating to newer version of shindig server will it resolve this issue