diff --git a/src/socketio/kafka_manager.py b/src/socketio/kafka_manager.py
index ad026f3..30ec3ca 100644
--- a/src/socketio/kafka_manager.py
+++ b/src/socketio/kafka_manager.py
@@ -1,6 +1,6 @@
 import logging
 import pickle
-from typing import List
+
 
 try:
     import kafka
@@ -9,7 +9,7 @@ except ImportError:
 
 from .pubsub_manager import PubSubManager
 
-logger = logging.getLogger('socketio')
+logger = logging.getLogger("socketio")
 
 
 class KafkaManager(PubSubManager):  # pragma: no cover
@@ -26,6 +26,8 @@ class KafkaManager(PubSubManager):  # pragma: no cover
 
     :param url: The connection URL for the Kafka server. For a default Kafka
                 store running on the same host, use ``kafka://``.
+                From now on you can pass a list of URLs to use
+                different Kafka servers.
     :param channel: The channel name (topic) on which the server sends and
                     receives notifications. Must be the same in all the
                     servers.
@@ -33,23 +35,29 @@ class KafkaManager(PubSubManager):  # pragma: no cover
                        default of ``False`` initializes the class for emitting
                        and receiving.
     """
-    name = 'kafka'
 
-    def __init__(self, url='kafka://localhost:9092',channel='socketio',
-                 write_only=False):
+    name = "kafka"
+
+    def __init__(
+        self, url="kafka://localhost:9092", channel="socketio", write_only=False
+    ):
         if kafka is None:
-            raise RuntimeError('kafka-python package is not installed '
-                               '(Run "pip install kafka-python" in your '
-                               'virtualenv).')
+            raise RuntimeError(
+                "kafka-python package is not installed "
+                '(Run "pip install kafka-python" in your '
+                "virtualenv)."
+            )
+
+        super(KafkaManager, self).__init__(channel=channel, write_only=write_only)
 
-        super(KafkaManager, self).__init__(channel=channel,
-                                           write_only=write_only)
-        
         urls = [url] if isinstance(url, str) else url
-        self.kafka_urls =  [url[8:] if url != 'kafka://' else 'localhost:9092' for url in urls]
+        self.kafka_urls = [
+            url[8:] if url != "kafka://" else "localhost:9092" for url in urls
+        ]
         self.producer = kafka.KafkaProducer(bootstrap_servers=self.kafka_urls)
-        self.consumer = kafka.KafkaConsumer(self.channel,
-                                            bootstrap_servers=self.kafka_urls)
+        self.consumer = kafka.KafkaConsumer(
+            self.channel, bootstrap_servers=self.kafka_urls
+        )
 
     def _publish(self, data):
         self.producer.send(self.channel, value=pickle.dumps(data))