[Tipp2014] change authorship of a poster

Dear Tipp2014 committee,

I have an accepted poster about "The GAP Project - GPU for Realtime Applications in High Level Trigger and Medical Imaging". Unfortunately I can't join the conference. Massimiliano Fiorini (reading in CC), co-author of the presented work, is available to present the poster in my place. Is it possible to change the poster authorship on indico?

Thanks for your answer, andrea