diff --git a/src/languages/lib/css-shared.js b/src/languages/lib/css-shared.js
index 381d984d1e..0ce69706c3 100644
--- a/src/languages/lib/css-shared.js
+++ b/src/languages/lib/css-shared.js
@@ -446,6 +446,11 @@ export const ATTRIBUTES = [
   'container-type',
   'content',
   'content-visibility',
+  'corner-bottom-left-shape',
+  'corner-bottom-right-shape',
+  'corner-shape',
+  'corner-top-left-shape',
+  'corner-top-right-shape',
   'counter-increment',
   'counter-reset',
   'counter-set',