diff --git a/dragonion_core/proto/file/auth.py b/dragonion_core/proto/file/auth.py
index 00f201e..9098ba6 100644
--- a/dragonion_core/proto/file/auth.py
+++ b/dragonion_core/proto/file/auth.py
@@ -8,8 +8,11 @@ class AuthFile(sqlitedict.SqliteDict):
     auth - v3 onion auth string in format, that can be written to .auth_private file
     """
     def __init__(self, service):
+        """
+        :param service: Service name or service.auth filename
+        """
         super().__init__(
-            filename=f'{service}.auth',
+            filename=f'{service}.auth' if '.auth' not in service else service,
             tablename='auth',
             autocommit=True
         )