diff --git a/migrations/testmodel_dob.py b/migrations/testmodel_dob.py
new file mode 100644
index 0000000..9343798
--- /dev/null
+++ b/migrations/testmodel_dob.py
@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.29 on 2021-07-09 13:04
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("demo", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="testmodel",
+            name="dob",
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+    ]
diff --git a/models.py b/models.py
index 2973db3..d503902 100644
--- a/models.py
+++ b/models.py
@@ -7,6 +7,7 @@ class TestModel(models.Model):
     created_at = models.DateTimeField(auto_now_add=True)
     update_at = models.DateTimeField(auto_now=True)
     name = models.CharField(max_length=500)
+    dob = models.DateTimeField(blank=True, null=True)
     age = models.PositiveIntegerField(default=500)
 
     if django.VERSION < (2, 1):