1 files changed, 5 insertions, 5 deletions
diff --git a/src/couch/feedreader.py b/src/couch/feedreader.py
index e293932..98401ab 100644
--- a/src/couch/feedreader.py
+++ b/src/couch/feedreader.py
@@ -1,13 +1,13 @@
 # -*- coding: utf-8 -*-
 # Based on py-couchdb (https://github.com/histrio/py-couchdb)
+from __future__ import annotations
 
-
-class BaseFeedReader(object):
+class BaseFeedReader:
     """
     Base interface class for changes feed reader.
     """
 
-    def __call__(self, db):
+    def __call__(self, db) -> BaseFeedReader:
         self.db = db
         return self
 
@@ -44,9 +44,9 @@ class SimpleFeedReader(BaseFeedReader):
     a valid feed reader interface.
     """
 
-    def __call__(self, db, callback):
+    def __call__(self, db, callback) -> BaseFeedReader:
         self.callback = callback
         return super(SimpleFeedReader, self).__call__(db)
 
-    def on_message(self, message):
+    def on_message(self, message) -> None:
         self.callback(message, db=self.db)