diff --git a/backend/apps/pet/migrations/0004_alter_pet_pet_photo_url.py b/backend/apps/pet/migrations/0004_alter_pet_pet_photo_url.py
new file mode 100644
index 0000000..d536d79
--- /dev/null
+++ b/backend/apps/pet/migrations/0004_alter_pet_pet_photo_url.py
@@ -0,0 +1,29 @@
+# Generated by Django 5.0.1 on 2024-02-19 06:15
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("pet", "0003_pet_pet_key_pet_slug"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="pet",
+            name="pet_photo_url",
+            field=models.FileField(
+                blank=True,
+                null=True,
+                upload_to="",
+                validators=[
+                    django.core.validators.FileExtensionValidator(
+                        allowed_extensions=["png", "jpg", "jpeg"]
+                    )
+                ],
+                verbose_name="Pet photo",
+            ),
+        ),
+    ]
diff --git a/backend/apps/pet/models.py b/backend/apps/pet/models.py
index b8714f0..dc9ca1a 100644
--- a/backend/apps/pet/models.py
+++ b/backend/apps/pet/models.py
@@ -57,6 +57,7 @@ class Pet(TimeStampedModel):
     pet_photo_url = models.FileField(
         _("Pet photo"),
         blank=True,
+        null=True,
         validators=[FileExtensionValidator(allowed_extensions=["png", "jpg", "jpeg"])],
     )
     location = models.CharField(_("Location"), max_length=50)
diff --git a/backend/apps/pet/views.py b/backend/apps/pet/views.py
index 38920f8..e5652be 100644
--- a/backend/apps/pet/views.py
+++ b/backend/apps/pet/views.py
@@ -131,7 +131,7 @@ def put(self, request, slug):
         serializer = self.serializer_class(pet, data=request.data)
         if serializer.is_valid():
             pet = serializer.save()
-            return Response(self.serializer_class(pet).data)
+            return Response(self.serializer_class(pet).data, status=status.HTTP_200_OK)
         return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
 
     def delete(self, request, slug):