Help with any theme

Update your theme

Get a new version of your theme without losing your settings.

When a new version is out, Shopify shows Update available on the theme in Online Store > Themes.

Choose Update available, then Add to theme library. Shopify makes an updated copy of your theme with your settings and content carried over. Your live theme isn't touched.
Preview the updated copy and check your key pages: home, a product, a collection and the cart.
When it looks right, publish the updated copy.

Changes you made to the theme's code are not carried over to the updated copy. Note them before you update, and add them again afterwards.

Each theme's release notes list what changed in every version. Shopify's guide to updating themes has more detail.