spring-cloud-netflix: Zuul proxy is not working with utf-8 urls

I have a spring cloud app with Zuul proxy. My zuul proxy doesn’t work with UTF-8 urls. How should I configure it?

This will work in my microservice, without proxy: http://localhost:8080/rest/item/гандан_тикет However when its behind a proxy http://localhost:9000/core/rest/item/гандан_тикет the гандан_тикет will come as ??????_????? into the microservice.