diff --git a/config/themes.yml b/config/themes.yml
index a3b94af369..1eeadb5250 100644
--- a/config/themes.yml
+++ b/config/themes.yml
@@ -6,7 +6,7 @@ tangerineui-lagoon: styles/tangerineui-lagoon.scss
 tangerineui-orange: styles/tangerineui-orange.scss
 tangerineui-grape: styles/tangerineui-cherry.scss
 modern-contrast: styles/modern-contrast.scss
-modern: styles/modern.css
+modern: styles/modern.scss
 modern-light: styles/modern-light.scss
 bird-contrast: styles/bird-contrast.scss
 bird: styles/bird.scss