diff --git a/osinaweb/billing/models.py b/osinaweb/billing/models.py
index 2c049e2a..597098bd 100644
--- a/osinaweb/billing/models.py
+++ b/osinaweb/billing/models.py
@@ -56,7 +56,7 @@ class OrderItem(models.Model):
     def save(self, *args, **kwargs):
         if self.purchased_at:
             try:
-                customer_email = self.order.customer.email
+                customer_email = self.order.customer.user.email
                 plan_name = self.item.title
 
                 payload = {