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id: 474b07f5-8186-4857-b14d-ea41f501be5e
title: Versioning
slug: /guides/version
max-toc-depth: 3
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## Introduction

Call Flow Builder offers built-in versioning.
This feature empowers users to test different configurations of a Call Flow without affecting the live version,
and to revert to a previous version if needed.

Once a Call Flow has been created, you can click on the `Version History` button located in the top left corner of the Call Flow Builder interface.
This will open a panel showing all the versions of the call flow, along with a timestamp of when the version was created.

<Frame caption="Opening the version history of a Call Flow.">
  ![Opening the version history of a Call Flow.](https://files.buildwithfern.com/signalwire.docs.buildwithfern.com/docs/8828a41a9dd601596e538ce9d03f5f6e46dc27531ad46cf07f9eb3a878714f0f/assets/images/call-flow/version_button.webp)
</Frame>

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## Deploy a new version

If you wish to make edits to a call flow, you can create a new version making any changes you need.
Once you are satisfied with the new version, you can click the `Deploy` button to make the new version the live version of the call flow.
When a new version is saved, it will add a new entry to the version history. The name of the
version will be `+1` from the previous version. E.g. `Version 1.0`, `Version 2.0`, `Version 3.0`, etc.

<Frame caption="Deploying a new version of a Call Flow.">
  ![Deploying a new version of a Call Flow.](https://files.buildwithfern.com/signalwire.docs.buildwithfern.com/docs/9f45e8b8ff0d960649ec56cebe8c3f73749d29ccaf45a67b592ff61b6c236a01/assets/images/call-flow/deploy_version.webp)
</Frame>

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## Revert changes

If you need to revert to a previous version of a call flow,
open the version history panel by clicking the `Version History` button.
Select the version to which you wish to revert.
Click the `Restore` button to confirm.

<Frame caption="Reverting to a previous version of a Call Flow.">
  ![Reverting to a previous version of a Call Flow.](https://files.buildwithfern.com/signalwire.docs.buildwithfern.com/docs/4723dc9a4be48b9f8b4fb6e2d21d1be0b74a72276b6d795021cab6f3552b8dd6/assets/images/call-flow/revert_version.webp)
</Frame>