How to make Curator not exclude system indices?

Elastic Stack Elasticsearch
1

I have an action

  kibana-snapshot:
    action: snapshot
    description: Backup the Kibana indicies, where all those lovely visualisations and index pattern settings and other good things are stored.
    options:
      timeout_override: 300
      repository: clogs_test
      name: curator-kibana-%Y-%m-%d-%H-%M
      include_global_state: False
    filters:
    - filtertype: pattern
      kind: prefix
      value: .kibana

Currently being used with Curator 7. I just tried it with Curator 8.0.21 and it fails because no indices are found. I've figured out this is because as of 8.0.18 Curator excludes system indices by default. What I haven't been able to figure out is, how does one make Curator not exclude system indices?