there are changes that are not released yet: [Make subscription tokens compatible with Centrifugo v4+](https://github.com/centrifugal/rubycent/commit/cee36531cbd3565f760637e1b4fc3fe713880d83) without it, it's not possible to work with Centrifugo 4+ using gem version 3.0.0
there are changes that are not released yet: Make subscription tokens compatible with Centrifugo v4+
without it, it's not possible to work with Centrifugo 4+ using gem version 3.0.0