CORS Violation between Segment and Unbounce

I am trying to integrate Segment with our Unbounce pages, but keep getting a CORS violation from a crossdomain ajax request:

“Access to XMLHttpRequest at ‘’ from origin ‘’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource.”

If it was Apache I know I’d be adding the policy to htaccess, but is this something that can be fixed in Unbounce?