> ## Documentation Index
> Fetch the complete documentation index at: https://www.marqeta.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# UX Toolkit Release Notes

> Release notes for the UX Toolkit: new features, enhancements, fixed issues, and breaking changes in each version.

## October 2026 release notes

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**New features**

## Switch themes without reloading the page with `updateTheme()`

**Version:** 2.2.0

**Release date:** 2026-10-23

The new `window.marqeta.updateTheme()` method switches the active theme after the page has loaded, without a reload. For example, use it to let cardholders switch between light and dark mode. The new theme applies to every UX Toolkit component on the page. To load the latest copy of a theme that you re-uploaded under the same name, pass `{ force: true }` as the second argument. For more information, see [Switching themes after bootstrap](https://www.marqeta.com/docs/developer-guides/uxt-customizing-ux-toolkit.md#switching-themes-after-bootstrap).

**Enhancements**

## Generate access tokens with a card token

When you generate a UX Toolkit OAuth access token, you can now send `card_token` as an alternative to `user_token`. A `card_token` limits the returned access token to that card, while a `user_token` grants access to all of the user's cards. Send one or the other, but not both. For more information, see [Generate UX Toolkit OAuth access token](https://www.marqeta.com/docs/core-api/uxt-sdk/generate-ux-toolkit-oauth-access-token.md) and [Customer Authentication API](https://www.marqeta.com/docs/developer-guides/uxt-customer-authentication-api.md).

## Security enhancements

**Version:** 2.2.0

**Release date:** 2026-10-23

This release contains security enhancements. No action is required.


## Related topics

- [January 2026 UX Toolkit Release Notes](https://www.marqeta.com/docs/developer-guides/ux-toolkit-release-notes/2026-01.md)
- [March 2026 UX Toolkit Release Notes](https://www.marqeta.com/docs/developer-guides/ux-toolkit-release-notes/2026-03.md)
- [April 2026 UX Toolkit Release Notes](https://www.marqeta.com/docs/developer-guides/ux-toolkit-release-notes/2026-04.md)
- [May 2026 UX Toolkit Release Notes](https://www.marqeta.com/docs/developer-guides/ux-toolkit-release-notes/2026-05.md)
- [June 2026 UX Toolkit Release Notes](https://www.marqeta.com/docs/developer-guides/ux-toolkit-release-notes/2026-06.md)