diff --git a/backend/apps/generation/migrations/0004_alter_generationrecord_model.py b/backend/apps/generation/migrations/0004_alter_generationrecord_model.py
new file mode 100644
index 0000000..4dd7ba0
--- /dev/null
+++ b/backend/apps/generation/migrations/0004_alter_generationrecord_model.py
@@ -0,0 +1,18 @@
+# Generated by Django 4.2.29 on 2026-03-16 07:00
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('generation', '0003_generationrecord_ark_task_id_and_more'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='generationrecord',
+            name='model',
+            field=models.CharField(choices=[('seedance_2.0', 'AirDrama'), ('seedance_2.0_fast', 'AirDrama Fast')], max_length=30, verbose_name='模型'),
+        ),
+    ]
diff --git a/k8s/backend-deployment.yaml b/k8s/backend-deployment.yaml
index 915d396..15d2691 100644
--- a/k8s/backend-deployment.yaml
+++ b/k8s/backend-deployment.yaml
@@ -93,6 +93,9 @@ spec:
           httpGet:
             path: /healthz/
             port: 8000
+            httpHeaders:
+            - name: Host
+              value: localhost
           initialDelaySeconds: 30
           periodSeconds: 10
           timeoutSeconds: 5
@@ -101,6 +104,9 @@ spec:
           httpGet:
             path: /healthz/
             port: 8000
+            httpHeaders:
+            - name: Host
+              value: localhost
           initialDelaySeconds: 15
           periodSeconds: 5
           timeoutSeconds: 3