diff --git a/alkatorapi/views.py b/alkatorapi/views.py
index 0c9f671..5161c53 100644
--- a/alkatorapi/views.py
+++ b/alkatorapi/views.py
@@ -54,7 +54,7 @@ def results(request):
             order = 'x.'
         results.append({
             'order': order,
-            'duration': user.duration,
+            'duration': str(user.duration),
             'alkator_category': ALKATOR_CHOICES_DICT[user.alkator_category],
             'starting_number': user.starting_number,
         })