diff --git a/smash/web/models.py b/smash/web/models.py
index 867d8e7d62a73533ffa04b394a8660d5aa86cf56..3d0bc6a73eb4e5c352452cc3dedc248fea3190e2 100644
--- a/smash/web/models.py
+++ b/smash/web/models.py
@@ -77,6 +77,7 @@ class Subject(models.Model):
         verbose_name='Phone number'
     )
     email = models.EmailField(
+        null=True,
         verbose_name='E-mail'
     )
     date_born = models.DateField(