diff --git a/smash/web/models.py b/smash/web/models.py
index f3c85fd8f928a3feea754e9dd3915b750b67f44b..3c1a699b3c4f6a9b56e79201dd4519e7b15d2f21 100644
--- a/smash/web/models.py
+++ b/smash/web/models.py
@@ -431,7 +431,6 @@ class Appointment(models.Model):
     )
     appointment_types = models.ManyToManyField(AppointmentType,
         verbose_name='Appointment types',
-        null=True, blank=True
     )
     room = models.ForeignKey(Room,
         verbose_name='Room ID',