diff --git a/event/models.py b/event/models.py
index a40ba6d..5b8910f 100644
--- a/event/models.py
+++ b/event/models.py
@@ -28,7 +28,10 @@ class Event(models.Model):
                 )
     description = models.TextField(_('description'))
     beginning_date = models.DateTimeField(_('date de début'))
-    ending_date = models.DateTimeField(_('date de fin'))
+    ending_date = models.DateTimeField(
+        _('date de fin'),
+        blank=True
+    )
 
     class Meta:
         verbose_name = _("évènement")