diff --git a/symposion/proposals/actions.py b/symposion/proposals/actions.py
index e46e2524..c502c0fe 100644
--- a/symposion/proposals/actions.py
+++ b/symposion/proposals/actions.py
@@ -23,7 +23,7 @@ def export_as_csv_action(
         elif exclude:
             excludeset = set(exclude)
             field_names = field_names - excludeset
-        response = HttpResponse(mimetype="text/csv")
+        response = HttpResponse(content_type="text/csv")
         response["Content-Disposition"] = "attachment; filename=%s.csv" % unicode(opts).replace(".", "_")
         writer = csv.writer(response)
         if header:
diff --git a/symposion/schedule/views.py b/symposion/schedule/views.py
index 98771b59..1367808b 100644
--- a/symposion/schedule/views.py
+++ b/symposion/schedule/views.py
@@ -78,7 +78,7 @@ def schedule_list_csv(request, slug=None):
     presentations = Presentation.objects.filter(section=schedule.section)
     presentations = presentations.exclude(cancelled=True).order_by("id")
 
-    response = HttpResponse(mimetype="text/csv")
+    response = HttpResponse(content_type="text/csv")
     if slug:
         file_slug = slug
     else: