diff --git a/pi/views.py b/pi/views.py
index 29d932b..ea63733 100644
--- a/pi/views.py
+++ b/pi/views.py
@@ -19,4 +19,4 @@ class PiLogViewSet(ReadOnlyModelViewSet):
     def simulate(self, request):
         """Run one simulation of the pi estimator."""
         simulation, _, _ = PiLog.objects.simulate()
-        return Response(self.get_serializer(simulation).data)
+        return Response(self.get_serializer(simulation).data, 201)