Issues Resolving Vaadin Chart Dependency in ivy.xml in eclipse

I want to use vaadin chart in my project and i added:
in my ivy.xml

i get the error below when i resolve my project:

[Some projects fail to be resolved
Impossible to resolve dependencies of com.example#v7proj;working@xyz-PC
unresolved dependency: com.vaadin#vaadin-charts;2.0: not found


<dependency org="com.vaadin.addon" name="vaadin-charts" rev="2.0.0.rc1" /> As mentioned here:

issue resolved! thanks!