diff --git a/theme/textalternativeform.css b/theme/textalternativeform.css
index c5963d61..ff8cee8a 100644
--- a/theme/textalternativeform.css
+++ b/theme/textalternativeform.css
@@ -3,7 +3,7 @@
  * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  */
 
-@import "@ckeditor/ckeditor5-theme-lark/theme/mixins/_rwd.css";
+@import "@ckeditor/ckeditor5-ui/theme/mixins/_rwd.css";
 
 .ck.ck-text-alternative-form {
 	display: flex;