In its recommendations, the Open Science Policy Platform identified Citizen Science as one of the key streams to strengthen the dialogue between science and society. Citizen Science projects produce interesting results but, more than that, they challenge the shape of current scholarly processes. The OSPP has emphatically linked libraries with Citizen Science, as being “well placed” for a number of activities. The role they can have has been echoed in Open Science Roadmaps from LIBER and LERU. The potential that OSPP sees in libraries is a responsibility that libraries have to respond to. In this frame, the presentation will introduce the new working group of LIBER that is expected to start working after June 2019 and will give an outline of the key areas that research libraries will need to work. These areas will help us prepare a future where sustainable new structures of knowledge will help European citizens participate in scientific processes.