diff --git a/jupyter_server_fileid/extension.py b/jupyter_server_fileid/extension.py
index d3a152a..ad605f7 100644
--- a/jupyter_server_fileid/extension.py
+++ b/jupyter_server_fileid/extension.py
@@ -4,7 +4,7 @@
 
 from jupyter_server_fileid.manager import FileIdManager
 
-from .handlers import FilePath2IdHandler, FileId2PathHandler
+from .handlers import FileId2PathHandler, FilePath2IdHandler
 
 
 class FileIdExtension(ExtensionApp):
@@ -57,6 +57,6 @@ def initialize_handlers(self):
                 (
                     r"/api/fileid/path/(.*)",
                     FileId2PathHandler,
-                )
+                ),
             ],
         )
diff --git a/jupyter_server_fileid/handlers.py b/jupyter_server_fileid/handlers.py
index 4e0a8e0..6a735d0 100644
--- a/jupyter_server_fileid/handlers.py
+++ b/jupyter_server_fileid/handlers.py
@@ -10,7 +10,6 @@ class FileIdAPIHandler(APIHandler):
 
 
 class FilePath2IdHandler(FileIdAPIHandler):
-
     @web.authenticated
     @authorized
     async def get(self, path):
@@ -45,8 +44,8 @@ async def put(self, path):
         self.set_status(201)
         return self.finish(str(idx))
 
-class FileId2PathHandler(FileIdAPIHandler):
 
+class FileId2PathHandler(FileIdAPIHandler):
     @web.authenticated
     @authorized
     async def get(self, idx):