After I moved my website from Wordpress to Jekyll, I hadn’t changed the theme for nearly 5 years. When I finally decided to change the theme recently, it turned out to be a lot more complicated than I expected. After a lot of trial and error, and searching the internet, and asking ChatGPT, I managed to get the theme changed. As a note to my future self, and to anyone else who might be struggling to update their Jekyll theme, I am outlining the steps here that will make it relatively straightforward for you to move from one theme to another.