Gson is used by Jest (our client for talking to Elasticsearch) internally. So we could change our own JSON serialization routines to work with Jackson or even plain StringBuilder if we liked (we took care to make the usage of Gson an implementation detail), but the dependency to Gson would still be needed. We could reconsider the usage of Jest altogether, but I'd hope that's a discussion we can have at a later point, so to focus on getting the first Tech Preview out to users? --Gunnar 2016-04-28 22:59 GMT+02:00 Sanne Grinovero <sanne(a)hibernate.org&gt;: