moby--moby/docs/reference/commandline/swarm_update.md

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title = "swarm update"
description = "The swarm update command description and usage"
keywords = ["swarm, update"]
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**Warning:** this command is part of the Swarm management feature introduced in Docker 1.12, and might be subject to non backward-compatible changes.

# swarm update

    Usage:  docker swarm update [OPTIONS]
    
    update the Swarm.
    
    Options:
          --auto-accept value               Auto acceptance policy (worker, manager or none)
          --dispatcher-heartbeat duration   Dispatcher heartbeat period (default 5s)
          --help                            Print usage
          --secret string                   Set secret value needed to accept nodes into cluster
          --task-history-limit int          Task history retention limit (default 10)
          --cert-expiry duration            Validity period for node certificates (default 2160h0m0s)

Updates a Swarm cluster with new parameter values. This command must target a manager node.


```bash
$ docker swarm update --auto-accept manager
```

## Related information

* [swarm init](swarm_init.md)
* [swarm join](swarm_join.md)
* [swarm leave](swarm_leave.md)