WordPress Speed Up Service | WordPress Website Maintenance Packages Reply To: Automatic wordpress updated deleted my additional css from theme, by benjamin Sorry to hear about your troubles. Don’t edit the theme files directly, otherwise your changes will be overwritten whenever the theme is updated. A better option is to use child themes especially if you intend to modify more than just CSS, create a child theme. Do you have current backups of your custom css? Reply To: Automatic wordpress updated deleted my additional css from theme