diff --git a/src/robot_interface/core/config.py b/src/robot_interface/core/config.py
index e8489bd..780f4d2 100644
--- a/src/robot_interface/core/config.py
+++ b/src/robot_interface/core/config.py
@@ -1,39 +1,47 @@
-
 from __future__ import unicode_literals
 
-import os
 
 class AgentSettings(object):
     """Agent port configuration."""
-    def __init__(self, actuating_receiver_port=5557, main_receiver_port=5555,video_sender_port=5556, audio_sender_port=5558):
+    def __init__(
+        self, 
+        actuating_receiver_port=5557, 
+        main_receiver_port=5555,
+        video_sender_port=5556, 
+        audio_sender_port=5558,
+    ):
         self.actuating_receiver_port = actuating_receiver_port
         self.main_receiver_port = main_receiver_port
         self.video_sender_port = video_sender_port
         self.audio_sender_port = audio_sender_port
-
 class VideoConfig(object):
     """Video configuration constants."""
-    def __init__(self, camera_index=0, resolution=2, color_space=11, fps=15, stream_name="Pepper Video", image_buffer=6):
+    def __init__(
+        self,
+        camera_index=0,
+        resolution=2,
+        color_space=11,
+        fps=15,
+        stream_name="Pepper Video",
+        image_buffer=6,
+    ):
         self.camera_index = camera_index
         self.resolution = resolution
         self.color_space = color_space
         self.fps = fps
         self.stream_name = stream_name  
         self.image_buffer  = image_buffer
-
 class AudioConfig(object):
     """Audio configuration constants."""
     def __init__(self, sample_rate=16000, chunk_size=512, channels=1):
         self.sample_rate = sample_rate
         self.chunk_size = chunk_size
         self.channels = channels
-
 class MainConfig(object):
     """Main configuration"""
     def __init__(self, poll_timeout_ms=100, max_handler_time_ms=50):
         self.poll_timeout_ms = poll_timeout_ms
         self.max_handler_time_ms = max_handler_time_ms
-
 class Settings(object):
     """Global settings container."""
     def __init__(self, agent_settings=None, video_config=None, audio_config=None, main_config=None):
diff --git a/src/robot_interface/endpoints/actuation_receiver.py b/src/robot_interface/endpoints/actuation_receiver.py
index 7fc6546..c5e8ab3 100644
--- a/src/robot_interface/endpoints/actuation_receiver.py
+++ b/src/robot_interface/endpoints/actuation_receiver.py
@@ -10,7 +10,7 @@ from robot_interface.core.config import settings
 
 
 class ActuationReceiver(ReceiverBase):
-    def __init__(self, zmq_context, port= settings.agent_settings.actuating_receiver_port):
+    def __init__(self, zmq_context, port=settings.agent_settings.actuating_receiver_port):
         """
         The actuation receiver endpoint, responsible for handling speech and gesture requests.
 
diff --git a/src/robot_interface/endpoints/audio_sender.py b/src/robot_interface/endpoints/audio_sender.py
index 2e1e45e..e6de258 100644
--- a/src/robot_interface/endpoints/audio_sender.py
+++ b/src/robot_interface/endpoints/audio_sender.py
@@ -14,7 +14,7 @@ logger = logging.getLogger(__name__)
 
 
 class AudioSender(SocketBase):
-    def __init__(self, zmq_context, port= settings.agent_settings.audio_sender_port):
+    def __init__(self, zmq_context, port=settings.agent_settings.audio_sender_port):
         super(AudioSender, self).__init__(str("audio"))  # Convert future's unicode_literal to str
         self.create_socket(zmq_context, zmq.PUB, port)
         self.thread = None
diff --git a/src/robot_interface/endpoints/main_receiver.py b/src/robot_interface/endpoints/main_receiver.py
index e5367c6..b0adf24 100644
--- a/src/robot_interface/endpoints/main_receiver.py
+++ b/src/robot_interface/endpoints/main_receiver.py
@@ -6,7 +6,7 @@ from robot_interface.state import state
 from robot_interface.core.config import settings
 
 class MainReceiver(ReceiverBase):
-    def __init__(self, zmq_context, port= settings.agent_settings.main_receiver_port):
+    def __init__(self, zmq_context, port=settings.agent_settings.main_receiver_port):
         """
         The main receiver endpoint, responsible for handling ping and negotiation requests.