diff --git a/frontend/src/pages/Lesson.vue b/frontend/src/pages/Lesson.vue
index ef1f4125..a931b02f 100644
--- a/frontend/src/pages/Lesson.vue
+++ b/frontend/src/pages/Lesson.vue
@@ -245,6 +245,8 @@ const lesson = createResource({
 })
 
 const renderEditor = (holder, content) => {
+	// empty the holder
+	document.getElementById(holder).innerHTML = ''
 	return new EditorJS({
 		holder: holder,
 		tools: getEditorTools(),