@giangio this is how I did that in the past: https://stackoverflow.com/questions/25918556/spring-boot-configure-custom-jsessionid-for-embedded-server with the first answer but apparently, you can do it by just changing the config from the second answer. I find this to be a valuable resource, but you have to be careful of the version because I know it changed a lot between 1.x and 2.x of spring boot: https://docs.spring.io/spring-boot/docs/current/reference/html/application-properties.html