How to turn off `entity-button`'s ripple effect

Hello. My lovelace’s ui entity-button has a ripple effect which is terrible on mobile: whenever I scroll down I think that I am pressing the button that I have touched.
I was able to track them to a div <div id="waves"></div> which changes to generate this effect. Is there an easy way to turn them off? I can do custom CSS that sets them to display: none but can I do it in lovelace theme? How?