diff --git a/ankisyncd/collection.py b/ankisyncd/collection.py
index b8cd0c2..c361cac 100644
--- a/ankisyncd/collection.py
+++ b/ankisyncd/collection.py
@@ -3,7 +3,7 @@ import anki.storage
 
 import os, errno
 
-class CollectionWrapper(object):
+class CollectionWrapper:
     """A simple wrapper around an anki.storage.Collection object.
 
     This allows us to manage and refer to the collection, whether it's open or not. It
@@ -84,7 +84,7 @@ class CollectionWrapper(object):
         """Returns True if the collection is open, False otherwise."""
         return self.__col is not None
 
-class CollectionManager(object):
+class CollectionManager:
     """Manages a set of CollectionWrapper objects."""
 
     collection_wrapper = CollectionWrapper
diff --git a/ankisyncd/sync_app.py b/ankisyncd/sync_app.py
index d54abd0..a24f138 100644
--- a/ankisyncd/sync_app.py
+++ b/ankisyncd/sync_app.py
@@ -276,7 +276,7 @@ class SyncMediaHandler(anki.sync.MediaSyncer):
 
         return {'data': result, 'err':''}
 
-class SyncUserSession(object):
+class SyncUserSession:
     def __init__(self, name, path, collection_manager, setup_new_collection=None):
         import time
         self.skey = self._generate_session_key()
@@ -319,7 +319,7 @@ class SyncUserSession(object):
         handler.col = col
         return handler
 
-class SimpleSessionManager(object):
+class SimpleSessionManager:
     """A simple session manager that keeps the sessions in memory."""
 
     def __init__(self):
@@ -339,7 +339,7 @@ class SimpleSessionManager(object):
     def delete(self, hkey):
         del self.sessions[hkey]
 
-class SyncApp(object):
+class SyncApp:
     valid_urls = SyncCollectionHandler.operations + SyncMediaHandler.operations + ['hostKey', 'upload', 'download']
 
     def __init__(self, config):
diff --git a/ankisyncd/thread.py b/ankisyncd/thread.py
index 9d2dcfd..ebb0fa5 100644
--- a/ankisyncd/thread.py
+++ b/ankisyncd/thread.py
@@ -5,7 +5,7 @@ from queue import Queue
 
 import time, logging
 
-class ThreadingCollectionWrapper(object):
+class ThreadingCollectionWrapper:
     """Provides the same interface as CollectionWrapper, but it creates a new Thread to 
     interact with the collection."""
 
diff --git a/ankisyncd/users.py b/ankisyncd/users.py
index 1f7cce7..5eebc77 100644
--- a/ankisyncd/users.py
+++ b/ankisyncd/users.py
@@ -6,7 +6,7 @@ import os
 import sqlite3 as sqlite
 
 
-class SimpleUserManager(object):
+class SimpleUserManager:
     """A simple user manager that always allows any user."""
 
     def __init__(self, collection_path=''):
diff --git a/tests/helpers/collection_utils.py b/tests/helpers/collection_utils.py
index 168883d..10fcaf5 100644
--- a/tests/helpers/collection_utils.py
+++ b/tests/helpers/collection_utils.py
@@ -6,7 +6,7 @@ import tempfile
 from anki import Collection
 
 
-class CollectionUtils(object):
+class CollectionUtils:
     """
     Provides utility methods for creating, inspecting and manipulating anki
     collections.
diff --git a/tests/helpers/mock_servers.py b/tests/helpers/mock_servers.py
index f35361a..d008186 100644
--- a/tests/helpers/mock_servers.py
+++ b/tests/helpers/mock_servers.py
@@ -4,7 +4,7 @@ import logging
 from anki.sync import HttpSyncer, RemoteServer, RemoteMediaServer
 
 
-class MockServerConnection(object):
+class MockServerConnection:
     """
     Mock for HttpSyncer's con attribute, a httplib2 connection. All requests
     that would normally got to the remote server will be redirected to our