Guava dependency issue

[fipil]

Hi,
I'm using the Silken in my application running on the Google App Engine (GAE). I built the app with using HTMLEASY and Silken and I was very happy with that.
Now I have a big problem. I'm trying to update my app, but your latest silken version (silken-2013-03-05.jar) is depending on the soy-2012-12-21, but the soy is depending on the Guava v16.
The problem is that some latest GAE SDK classes depends on newer version of Guava (v17+) so I cannot longer run the silken on the GAE because of dependency conflicts. I was searching a lot on google/stackowerflow and found some informations that the both versions of Guava (16 and 17) doesnt work together.
Please, would it be possible to update Silken so it uses the latest Soy library (v soy-2015-04-10) which depends on the latest Guava as well as the GAE classes?

Thanks a lot!
Filip.