diff --git a/packages/ckeditor5/src/index.ts b/packages/ckeditor5/src/index.ts
index c1e30588c..ce45a6876 100644
--- a/packages/ckeditor5/src/index.ts
+++ b/packages/ckeditor5/src/index.ts
@@ -1,2 +1,3 @@
+import "ckeditor5/ckeditor5.css";
 export { EditorWatchdog, BalloonEditor, DecoupledEditor } from "ckeditor5";
 export * from "./plugins.js";