diff --git a/storage/api.py b/storage/api.py
index 81ea7fa..d0e0f60 100644
--- a/storage/api.py
+++ b/storage/api.py
@@ -17,13 +17,16 @@ def upload_file(original=None, name=None, base64=None) -> File:
     return new_file
 
 
-def add_comment(text: str, email: str, files=[]) -> Comment:
+def add_comment(text: str, email: str, files=None) -> Comment:
     """
     :param text: sting
     :param email: string
     :param files: {name?: string, original?: File, base64?: string}[] одно из двух последних свойств должно быть указано
     :return: Comment
     """
+
+    files = [] if files is None else files
+
     key = ''.join(random.choice(string.ascii_letters) for _x in range(15))
     comment = Comment.objects.create(
         text=text,