diff --git a/djstripe/migrations/0001_initial.py b/djstripe/migrations/0001_initial.py
index 4cad9d93a7..7431e88b90 100644
--- a/djstripe/migrations/0001_initial.py
+++ b/djstripe/migrations/0001_initial.py
@@ -204,9 +204,9 @@ class Migration(migrations.Migration):
                 ('coupon_start', djstripe.fields.StripeDateTimeField(editable=False, help_text='If a coupon is present, the date at which it was applied.', null=True)),
                 ('coupon_end', djstripe.fields.StripeDateTimeField(editable=False, help_text='If a coupon is present and has a limited duration, the date that the discount will end.', null=True)),
                 ('email', djstripe.fields.StripeTextField(null=True)),
-                ('shipping', djstripe.fields.StripeJSONField(help_text='Shipping information associated with the customer.', null=True)),
+                ('shipping', djstripe.fields.StripeJSONField(help_text='Shipping information associated with the customer.', null=True, blank=True)),
                 ('date_purged', models.DateTimeField(editable=False, null=True)),
-                ('coupon', models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, to='djstripe.Coupon')),
+                ('coupon', models.ForeignKey(null=True, blank=True, on_delete=django.db.models.deletion.SET_NULL, to='djstripe.Coupon')),
             ],
         ),
         migrations.CreateModel(
@@ -516,7 +516,7 @@ class Migration(migrations.Migration):
                 ('canceled_at', djstripe.fields.StripeDateTimeField(blank=True, help_text='If the subscription has been canceled, the date of that cancellation. If the subscription was canceled with ``cancel_at_period_end``, canceled_at will still reflect the date of the initial cancellation request, not the end of the subscription period when the subscription is automatically moved to a canceled state.', null=True)),
                 ('current_period_end', djstripe.fields.StripeDateTimeField(help_text='End of the current period for which the subscription has been invoiced. At the end of this period, a new invoice will be created.')),
                 ('current_period_start', djstripe.fields.StripeDateTimeField(help_text='Start of the current period for which the subscription has been invoiced.')),
-                ('days_until_due', djstripe.fields.StripeIntegerField(help_text='Number of days a customer has to pay invoices generated by this subscription. This value will be `null` for subscriptions where `billing=charge_automatically`.', null=True)),
+                ('days_until_due', djstripe.fields.StripeIntegerField(help_text='Number of days a customer has to pay invoices generated by this subscription. This value will be `null` for subscriptions where `billing=charge_automatically`.', null=True, blank=True)),
                 ('ended_at', djstripe.fields.StripeDateTimeField(blank=True, help_text='If the subscription has ended (either because it was canceled or because the customer was switched to a subscription to a new plan), the date the subscription ended.', null=True)),
                 ('quantity', djstripe.fields.StripeIntegerField(help_text='The quantity applied to this subscription.')),
                 ('start', djstripe.fields.StripeDateTimeField(help_text='Date the subscription started.')),
diff --git a/djstripe/models.py b/djstripe/models.py
index 4bcff83ca2..718024c80d 100644
--- a/djstripe/models.py
+++ b/djstripe/models.py
@@ -771,6 +771,7 @@ class Customer(StripeObject):
         )
     )
     business_vat_id = StripeCharField(
+        blank=True,
         max_length=20,
         null=True,
         stripe_required=False,
@@ -787,7 +788,7 @@ class Customer(StripeObject):
         help_text="Whether or not the latest charge for the customer's latest invoice has failed."
     )
     # <discount>
-    coupon = ForeignKey("Coupon", null=True, on_delete=SET_NULL)
+    coupon = ForeignKey("Coupon", null=True, blank=True, on_delete=SET_NULL)
     coupon_start = StripeDateTimeField(
         null=True, editable=False, stripe_name="discount.start", stripe_required=False,
         help_text="If a coupon is present, the date at which it was applied."
@@ -798,7 +799,7 @@ class Customer(StripeObject):
     )
     # </discount>
     email = StripeTextField(null=True)
-    shipping = StripeJSONField(stripe_required=False, help_text="Shipping information associated with the customer.")
+    shipping = StripeJSONField(blank=True, stripe_required=False, help_text="Shipping information associated with the customer.")
 
     # dj-stripe fields
     subscriber = ForeignKey(
@@ -2823,7 +2824,7 @@ class Subscription(StripeObject):
         related_name="subscriptions",
         help_text="The customer associated with this subscription."
     )
-    days_until_due = StripeIntegerField(stripe_required=False, help_text=(
+    days_until_due = StripeIntegerField(blank=True, stripe_required=False, help_text=(
         "Number of days a customer has to pay invoices generated by this subscription. "
         "This value will be `null` for subscriptions where `billing=charge_automatically`."
     ))