# Update a version

Update information or content of the specific template version. Existing fields not included in the request will not be changed

Endpoint: PUT /v3/{domain_name}/templates/{template_name}/versions/{version_name}
Version: 3.0.0
Security: basicAuth

## Path parameters:

  - `domain_name` (string, required)
    Domain name the template is associated with.

  - `template_name` (string, required)
    template name the version is stored under.

  - `version_name` (string, required)
    Tag of the version of the template to be updated

## Request fields (multipart/form-data):

  - `template` (string)
    Content of the template.

  - `comment` (string)
    Comment related to the version that is being created.

  - `active` (string)
    If this flag is set to yes, this version becomes active

  - `headers` (string)
    Key value JSON object of headers to be stored with the template. Where key is the header name and value is the header value. The header names , , and  are the only ones currently supported.  These headers will be inserted into the MIME at the time we attempt delivery.

## Response 200 fields (application/json):

  - `message` (string, required)
    Response message

  - `template` (object, required)
    Template change details

  - `template.name` (string, required)
    Name of the template

  - `template.version` (any)
    Template version details