Ahoy 2.0.0 [1] introduced automatic UUID generation for visit_token and visitor_token. As a result, the custom ensure_uuid method is no longer needed and can be safely removed from the initializer. Since we aren't manually generating UUIDs anymore, we no longer need the uuidtools dependency. [1] https://github.com/ankane/ahoy/blob/v2.0.0/README.md#token-generation