Widgets are updated to introduce new features or to squash bugs. However, these updates are never pushed automatically to any of the themes on a Shopify store. This way, you can be sure that any of your custom code doesn’t get overwritten without you knowing.
Algolia for Shopify notifies you of any updates in-app notifications or banners.
To update the widgets to the latest version, go to the Search options tab and re-enable the widgets for a particular theme. Please note that Re-enabling widgets in the theme removes all customizations you’ve done. After customizing the widget code, duplicate the theme first to avoid losing your changes.
To re-enable Algolia for your theme: