diff --git a/uncloud/api/create_image_store.py b/uncloud/api/create_image_store.py
index 73b92f1..9259be6 100755
--- a/uncloud/api/create_image_store.py
+++ b/uncloud/api/create_image_store.py
@@ -7,14 +7,14 @@ from uncloud.shared import shared
 from uncloud.settings import settings
 
 data = {
-    "is_public": True,
-    "type": "ceph",
-    "name": "images",
-    "description": "first ever public image-store",
-    "attributes": {"list": [], "key": [], "pool": "images"},
+    'is_public': True,
+    'type': 'ceph',
+    'name': 'images',
+    'description': 'first ever public image-store',
+    'attributes': {'list': [], 'key': [], 'pool': 'images'},
 }
 
 shared.etcd_client.put(
-    os.path.join(settings["etcd"]["image_store_prefix"], uuid4().hex),
+    os.path.join(settings['etcd']['image_store_prefix'], uuid4().hex),
     json.dumps(data),
 )
diff --git a/uncloud/cli/image.py b/uncloud/cli/image.py
index 641a00f..2f59c32 100644
--- a/uncloud/cli/image.py
+++ b/uncloud/cli/image.py
@@ -12,7 +12,7 @@ class ImageParser(BaseParser):
         p = self.subparser.add_parser('create', **kwargs)
         p.add_argument('--name', required=True)
         p.add_argument('--uuid', required=True)
-        p.add_argument('--image-store-name', default='image_store')
+        p.add_argument('--image-store', required=True, dest='image_store')
 
     def list(self, **kwargs):
         self.subparser.add_parser('list', **kwargs)