diff --git a/app/api/views/upload/catalog.py b/app/api/views/upload/catalog.py
index bed7717b..fe4076e4 100644
--- a/app/api/views/upload/catalog.py
+++ b/app/api/views/upload/catalog.py
@@ -6,6 +6,7 @@ from typing_extensions import Literal
 
 from ...models import DOCUMENT_CLASSIFICATION, SEQ2SEQ, SEQUENCE_LABELING
 from . import examples
+
 encodings = Literal[
     'Auto',
     'ascii',