diff --git a/invoices_app/migrations/0008_auto_20200724_1318.py b/invoices_app/migrations/0008_auto_20200724_1318.py
new file mode 100644
index 0000000..1a847ee
--- /dev/null
+++ b/invoices_app/migrations/0008_auto_20200724_1318.py
@@ -0,0 +1,37 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.24 on 2020-07-24 13:18
+from __future__ import unicode_literals
+
+from decimal import Decimal
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('invoices_app', '0007_auto_20200616_1803'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='historicalinvoice',
+            name='net_amount',
+            field=models.DecimalField(blank=True, decimal_places=2, max_digits=20, null=True, validators=[django.core.validators.MinValueValidator(Decimal('0.01'))], verbose_name='Net amount'),
+        ),
+        migrations.AlterField(
+            model_name='historicalinvoice',
+            name='vat',
+            field=models.DecimalField(blank=True, decimal_places=2, max_digits=20, null=True, validators=[django.core.validators.MinValueValidator(Decimal('0.00'))], verbose_name='Tax Liens'),
+        ),
+        migrations.AlterField(
+            model_name='invoice',
+            name='net_amount',
+            field=models.DecimalField(blank=True, decimal_places=2, max_digits=20, null=True, validators=[django.core.validators.MinValueValidator(Decimal('0.01'))], verbose_name='Net amount'),
+        ),
+        migrations.AlterField(
+            model_name='invoice',
+            name='vat',
+            field=models.DecimalField(blank=True, decimal_places=2, max_digits=20, null=True, validators=[django.core.validators.MinValueValidator(Decimal('0.00'))], verbose_name='Tax Liens'),
+        ),
+    ]
diff --git a/invoices_app/models.py b/invoices_app/models.py
index 14d27df..f2c1f7e 100644
--- a/invoices_app/models.py
+++ b/invoices_app/models.py
@@ -47,12 +47,16 @@ class Meta:
         max_digits=20,
         decimal_places=2,
         validators=[MinValueValidator(Decimal('0.01'))],
+        blank=True,
+        null=True,
     )
     vat = models.DecimalField(
         max_digits=20,
         decimal_places=2,
         validators=[MinValueValidator(Decimal('0.00'))],
         verbose_name=_('Tax Liens'),
+        blank=True,
+        null=True,
     )
     total_amount = models.DecimalField(
         max_digits=20,