diff --git a/migrations/0002_alter_testmodel_active.py b/migrations/0002_alter_testmodel_active.py
new file mode 100644
index 0000000..7cc2a84
--- /dev/null
+++ b/migrations/0002_alter_testmodel_active.py
@@ -0,0 +1,29 @@
+# Generated by Django 3.2.4 on 2021-07-03 05:41
+import django
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("demo", "0001_initial"),
+    ]
+
+    operations = [
+        (
+            (
+                migrations.AlterField(
+                    model_name="testmodel",
+                    name="active",
+                    field=models.NullBooleanField(default=True),
+                )
+            )
+            if django.VERSION < (2, 1)
+            else (
+                migrations.AlterField(
+                    model_name="testmodel",
+                    name="active",
+                    field=models.BooleanField(default=True),
+                )
+            )
+        ),
+    ]
diff --git a/models.py b/models.py
index 2973db3..54629c1 100644
--- a/models.py
+++ b/models.py
@@ -10,9 +10,9 @@ class TestModel(models.Model):
     age = models.PositiveIntegerField(default=500)
 
     if django.VERSION < (2, 1):
-        active = models.NullBooleanField()
+        active = models.NullBooleanField(default=True)
     else:
-        active = models.BooleanField(null=True)
+        active = models.BooleanField(default=True)
 
     class Meta:
         verbose_name = _("test model")