diff --git a/nummi/main/views.py b/nummi/main/views.py
index a95c403..2806b42 100644
--- a/nummi/main/views.py
+++ b/nummi/main/views.py
@@ -263,8 +263,8 @@ class SnapshotUpdateView(NummiUpdateView):
                 "data": _categories,
                 "max": max(
                     _categories.aggregate(
-                        max=models.Max("sum_p"),
-                        min=models.Min("sum_m"),
+                        max=models.Max("sum_p", default=0),
+                        min=models.Min("sum_m", default=0),
                     ).values(),
                 ),
             }