diff --git a/ptvp35/__init__.py b/ptvp35/__init__.py
index a685295..d67831b 100644
--- a/ptvp35/__init__.py
+++ b/ptvp35/__init__.py
@@ -8,7 +8,7 @@ from io import StringIO
 from typing import Any, Optional, IO, Type, Hashable
 
 
-__all__ = ('KVRequest', 'KVJson', 'DbConnection', 'DbFactory', 'Db', )
+__all__ = ('KVRequest', 'KVJson', 'DbConnection', 'DbFactory', 'Db',)
 
 
 class Request:
@@ -99,8 +99,8 @@ class DbConnection:
     __initial_size: int
 
     def __init__(
-        self,
-        factory: 'DbFactory',
+            self,
+            factory: 'DbFactory',
     ) -> None:
         self.factory = factory
         path = self.factory.path
@@ -282,6 +282,7 @@ class DbConnection:
         del self.__task
         del self.__initial_size
 
+
 class DbFactory:
     def __init__(self, path: str | pathlib.Path, *, kvrequest_type: Type[KVRequest], buffersize=1048576):
         self.path = path = str(path)