diff --git a/generic/views.py b/generic/views.py
index 7adfffee..2e39cbc7 100644
--- a/generic/views.py
+++ b/generic/views.py
@@ -335,7 +335,7 @@ class ExamViews(View, LoginRequiredMixin):
                 if self.question_type == "long":
                     h = {}
                     for question in exam.exam_questions.all():
-                        h[question.pk] = question.json_creation_time
+                        h[question.pk] = question.json_creation_time.isoformat()
                     json["multi_question_json"] = h
                 active_exams["exams"].append( json )