diff --git a/sf_daq_broker/broker_manager.py b/sf_daq_broker/broker_manager.py
index 3f4487e..89b65c5 100644
--- a/sf_daq_broker/broker_manager.py
+++ b/sf_daq_broker/broker_manager.py
@@ -82,7 +82,7 @@ def get_current_step_in_scan(meta_directory=None):
 
     return current_step
 
-class BrokerManager(object):
+class BrokerManager:
     REQUIRED_PARAMETERS = ["output_file"]
 
     def __init__(self, broker_client):
diff --git a/sf_daq_broker/broker_manager_slow.py b/sf_daq_broker/broker_manager_slow.py
index 087d76e..2b2f61f 100644
--- a/sf_daq_broker/broker_manager_slow.py
+++ b/sf_daq_broker/broker_manager_slow.py
@@ -63,7 +63,7 @@ def register_rest_interface(app, manager):
         return json.dumps({"state": "error",
                            "status": error_text})
 
-class DetectorManager(object):
+class DetectorManager:
 
     def get_detector_settings(self, request=None, remote_ip=None):
 
diff --git a/sf_daq_broker/rabbitmq/msg_broker_client.py b/sf_daq_broker/rabbitmq/msg_broker_client.py
index b5252e7..2bc9e7b 100644
--- a/sf_daq_broker/rabbitmq/msg_broker_client.py
+++ b/sf_daq_broker/rabbitmq/msg_broker_client.py
@@ -7,7 +7,7 @@ from pika import BlockingConnection, ConnectionParameters, BasicProperties
 
 from time import sleep
 
-class RabbitMqClient(object):
+class RabbitMqClient:
 
     def __init__(self, broker_url=broker_config.DEFAULT_BROKER_URL):
         self.broker_url = broker_url