diff --git a/netbox_dns_bridge/migrations/0003_integerkeyvaluesetting_key_unique.py b/netbox_dns_bridge/migrations/0003_integerkeyvaluesetting_key_unique.py
new file mode 100644
index 0000000..c2480ae
--- /dev/null
+++ b/netbox_dns_bridge/migrations/0003_integerkeyvaluesetting_key_unique.py
@@ -0,0 +1,16 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("netbox_dns_bridge", "0002_alter_integerkeyvaluesetting_options_and_more"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="integerkeyvaluesetting",
+            name="key",
+            field=models.CharField(max_length=64, unique=True),
+        ),
+    ]
diff --git a/netbox_dns_bridge/models.py b/netbox_dns_bridge/models.py
index fa599e9..09aa5a1 100644
--- a/netbox_dns_bridge/models.py
+++ b/netbox_dns_bridge/models.py
@@ -7,7 +7,7 @@ import netbox_dns.models
 class IntegerKeyValueSetting(models.Model):
     _netbox_private = True
 
-    key = models.CharField(max_length=64)
+    key = models.CharField(max_length=64, unique=True)
     value = models.IntegerField()
 
     def __str__(self):