diff --git a/src/ckeditor.js b/src/ckeditor.js
index 6c06f30aa7..bb0083bdca 100644
--- a/src/ckeditor.js
+++ b/src/ckeditor.js
@@ -28,7 +28,7 @@ import PasteFromOffice from '@ckeditor/ckeditor5-paste-from-office/src/pastefrom
 import Table from '@ckeditor/ckeditor5-table/src/table';
 import TableToolbar from '@ckeditor/ckeditor5-table/src/tabletoolbar';
 
-export default class ClassicEditor extends ClassicEditorBase {}
+class ClassicEditor extends ClassicEditorBase {}
 
 // Plugins to include in the build.
 ClassicEditor.builtinPlugins = [
@@ -92,3 +92,5 @@ ClassicEditor.defaultConfig = {
 	// This value must be kept in sync with the language defined in webpack.config.js.
 	language: 'en'
 };
+
+export default ClassicEditor;