> ## Documentation Index
> Fetch the complete documentation index at: https://developer.z-api.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Updating the subscription

> Updates an instance subscription to enable call support

## Overview

Method used to update an instance subscription to enable call support.

<Warning>
  The **withCalls** attribute is required and only accepts the value **true**. It is not possible to downgrade the subscription (remove calls). To do so, cancel the current subscription and contract a new one.
</Warning>

<Info>
  This feature is only available for accounts with call functionality enabled.
</Info>

<Warning>
  To use Partner endpoints, provide the Partner Token in the **Authorization** field using the following format: `Bearer <Partner-Token>`

  It is not necessary to send the **Client-Token** in these requests.
</Warning>

***

## Attributes

### Required

<ParamField body="withCalls" type="boolean" required>
  Must be sent as `true` to enable calls
</ParamField>

***

## Request Body

```json theme={"theme":{"light":"github-light","dark":"poimandres"}}
{
  "withCalls": true
}
```

***

## Response

### 201

### 405

Make sure you are correctly sending the method specification, that is, verify that you sent POST or GET as specified at the beginning of this topic.

### 415

If you receive a 415 error, make sure to add the "Content-Type" header to your request, which in most cases is "application/json".