diff --git a/ucloud/api/create_image_store.py b/ucloud/api/create_image_store.py
index 17fa63c..259b9c8 100755
--- a/ucloud/api/create_image_store.py
+++ b/ucloud/api/create_image_store.py
@@ -3,7 +3,7 @@ import os
 
 from uuid import uuid4
 
-from ucloud.config import etcd_client, env_vars
+from ucloud.config import etcd_client, config
 
 data = {
     "is_public": True,
@@ -13,4 +13,4 @@ data = {
     "attributes": {"list": [], "key": [], "pool": "images"},
 }
 
-etcd_client.put(os.path.join(env_vars.get('IMAGE_STORE_PREFIX'), uuid4().hex), json.dumps(data))
+etcd_client.put(os.path.join(config['api']['IMAGE_STORE_PREFIX'], uuid4().hex), json.dumps(data))