Not at this time. There is no deadline for the migration, and a Button with API v1 continues to operate. But
Pipedrive recommends that applications move to [Pipedrive API v2](https://pipedrive.readme.io/docs/pipedrive-api-v2).
API v2 is faster and more reliable than API v1. Thus, start the migration soon.

## Which Buttons to migrate

Migrate each Workflow button and each Link button that shows **V1** in the Buttons list. See
[Manage Buttons](/docs/buttons/manage-buttons).

- A new Button uses API v2.
- An Interface button has no API version.

## Why the migration is not automatic

The field data of API v2 is partially different from API v1. Some fields have a different key, and some fields are
not in API v2. You must select these fields again. A migrated Workflow button can also send a different payload to
your process. Thus, migrate each Button one at a time, and test it before the users see it.

For the steps, see [Migrate to API v2](/docs/buttons/migrate-to-api-v2).