diff --git a/netbox_routing/migrations/0001_initial.py b/netbox_routing/migrations/0001_initial.py
index f16d9f3..65b83fd 100644
--- a/netbox_routing/migrations/0001_initial.py
+++ b/netbox_routing/migrations/0001_initial.py
@@ -90,8 +90,8 @@ class Migration(migrations.Migration):
                 ('sequence', models.PositiveSmallIntegerField()),
                 ('type', models.CharField(max_length=6)),
                 ('prefix', ipam.fields.IPNetworkField()),
-                ('ge', models.PositiveSmallIntegerField()),
-                ('le', models.PositiveSmallIntegerField()),
+                ('ge', models.PositiveSmallIntegerField(blank=True, null=True)),
+                ('le', models.PositiveSmallIntegerField(blank=True, null=True)),
                 ('prefix_list', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='entries', to='netbox_routing.prefixlist')),
                 ('tags', taggit.managers.TaggableManager(through='extras.TaggedItem', to='extras.Tag')),
             ],