diff --git a/nonebot_bison/config/subs_io/utils.py b/nonebot_bison/config/subs_io/utils.py
index c862b78..1ba7558 100644
--- a/nonebot_bison/config/subs_io/utils.py
+++ b/nonebot_bison/config/subs_io/utils.py
@@ -1,10 +1,13 @@
+from ..db_model import Model
+
+
 class NBESFVerMatchErr(Exception): ...
 
 
 class NBESFParseErr(Exception): ...
 
 
-def row2dict(row):
+def row2dict(row: Model) -> dict:
     d = {}
     for column in row.__table__.columns:
         d[column.name] = str(getattr(row, column.name))