Begin of the insertionAs Rails 5.2 is soon to be released, [Rails 5.0 will soon loose support for security updates](http://guides.rubyonrails.org/maintenance_policy.html). We therefore have to bump the Rails version used to at least 5.1. Rails 5.2 would require us to address the problem of having a catch-all route among other things, which might be too much of an investment at the moment. But with the efforts to reduce deprecations for 5.1, we should at least be able to migrate to that version.End of the insertion