# Upgrade to Themes v3

Source: https://dev.arcxp.com/themes/migration-guides/upgrade-v2-to-v3-arc-blocks/

> **Caution:**
> 
> Themes 3 will reach end of life on June 1, 2026\. Please [upgrade to Themes 4](https://dev.arcxp.com/themes/migration-guides/upgrade-to-themes-4) before this date.

To upgrade from Themes v2 to v3, follow the [Migrating from PageBuilder Engine 5.x to 6.x](https://dev.arcxp.com/pagebuilder-engine/developer-docs/migrating-from-pagebuilder-engine-5x-to-6x/) guide.

> **Tip:**
> 
> You should verify that your custom blocks are compatible with Engine v6.

The `arc-themes-components` version specified in the `package.json` file must match the version specified in the `themesReleaseVersion` property of the `blocks.json` file. See the latest themes version in the [Arc Themes Components Repository](https://github.com/WPMedia/arc-themes-components) to keep your dependencies up-to-date.