diff --git a/themis/datatypes/views.py b/themis/datatypes/views.py
index 17df8d4..f241434 100644
--- a/themis/datatypes/views.py
+++ b/themis/datatypes/views.py
@@ -16,6 +16,7 @@ class DeputyJson(BrowserView):
            'website': self.context.website,
            'degrees': self.context.degrees,
            'mandates': self.context.mandates,
+           'seat_number': self.context.seat_number,
         }
         if self.context.polgroup:
            d['polgroup'] = self.context.polgroup.to_object.title