diff --git a/progress/views.py b/progress/views.py
index 3c0c60b..446d276 100644
--- a/progress/views.py
+++ b/progress/views.py
@@ -187,7 +187,7 @@ class StudentUpdateProgress(APIView):
             res = {"current": ProgressLessonSerializer(pv).data}
             if pv.status == ProgressLesson.STATUSES.done:
                 # TODO: Ассинхроннаязадача для celery
-                res['next'] = add_next_lesson(p)
+                res['next'] = ProgressLessonSerializer(add_next_lesson(p)).data
 
             return Response(res, status=200)