# Update Watcher index settings

**PUT /_watcher/settings**

Update settings for the Watcher internal index (`.watches`).
Only a subset of settings can be modified.
This includes `index.auto_expand_replicas`, `index.number_of_replicas`, `index.routing.allocation.exclude.*`,
`index.routing.allocation.include.*` and `index.routing.allocation.require.*`.
Modification of `index.routing.allocation.include._tier_preference` is an exception and is not allowed as the
Watcher shards must always be in the `data_content` tier.

## Required authorization

* Cluster privileges: `manage_watcher`



## Servers
- http://api.example.com: http://api.example.com ()


## Authentication methods
- Api key auth
- Basic auth
- Bearer auth


## Parameters


### Query parameters
- **master_timeout** (string)
  The period to wait for a connection to the master node.
  If no response is received before the timeout expires, the request fails and returns an error.
- **timeout** (string)
  The period to wait for a response.
  If no response is received before the timeout expires, the request fails and returns an error.

### Body: application/json (object)

- **index.auto_expand_replicas** (string)

- **index.number_of_replicas** (number)



## Responses
### 200


#### Body: application/json (object)
- **acknowledged** (boolean)



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