This rule was introduced in stylelint 16.23. Out of the deprecated properties it detects, we were only using `word-wrap`. According to the CSS Working Group [1]: > For legacy reasons, UAs must treat word-wrap as a legacy name alias of > the overflow-wrap property. Since there's universal browser support for `overflow-wrap: break-word` [2], we can safely replace `word-wrap` with `overflow-wrap`. [1] https://drafts.csswg.org/css-text/#overflow-wrap-property [2] https://caniuse.com/mdn-css_properties_overflow-wrap_break-word