# Class names update in 3.4.0 In [WooCommerce Blocks 3.4.0](https://developer.woocommerce.com/2020/09/15/woocommerce-blocks-3-4-0-release-notes/), we replaced the class as listed below. ## Replaced classes | Removed | New class name | | ----------------------------------- | ------------------------- | | `wc-block-components-checkout-form` | `wc-block-checkout__form` | --- [We're hiring!](https://woo.com/careers/) Come work with us! 🐞 Found a mistake, or have a suggestion? [Leave feedback about this document here.](https://github.com/woocommerce/woocommerce-blocks/issues/new?assignees=&labels=type%3A+documentation&template=--doc-feedback.md&title=Feedback%20on%20./docs/designers/theming/class-names-update-340.md)