diff --git a/frontend/src/pages/Lesson.vue b/frontend/src/pages/Lesson.vue
index c99185b4..469dedbf 100644
--- a/frontend/src/pages/Lesson.vue
+++ b/frontend/src/pages/Lesson.vue
@@ -298,7 +298,7 @@ watch(
 		[newChapterNumber, newLessonNumber],
 		[oldChapterNumber, oldLessonNumber]
 	) => {
-		if (newChapterNumber && newLessonNumber) {
+		if (newChapterNumber || newLessonNumber) {
 			lesson.submit({
 				chapter: newChapterNumber,
 				lesson: newLessonNumber,