diff --git a/libp2p/kad_dht/common.py b/libp2p/kad_dht/common.py
index d7fb6c76..392bffd0 100644
--- a/libp2p/kad_dht/common.py
+++ b/libp2p/kad_dht/common.py
@@ -1,5 +1,5 @@
 """
-Common Objects for Kademlia DHT implementation.
+Shared constants and protocol parameters for the Kademlia DHT.
 """
 
 from libp2p.custom_types import (
diff --git a/libp2p/kad_dht/kad_dht.py b/libp2p/kad_dht/kad_dht.py
index b47d59e7..dcf323ba 100644
--- a/libp2p/kad_dht/kad_dht.py
+++ b/libp2p/kad_dht/kad_dht.py
@@ -5,7 +5,9 @@ This module provides a complete Distributed Hash Table (DHT)
 implementation based on the Kademlia algorithm and protocol.
 """
 
-from enum import Enum
+from enum import (
+    Enum,
+)
 import logging
 import time
 
diff --git a/libp2p/kad_dht/routing_table.py b/libp2p/kad_dht/routing_table.py
index af4c7439..9ca59031 100644
--- a/libp2p/kad_dht/routing_table.py
+++ b/libp2p/kad_dht/routing_table.py
@@ -2,13 +2,17 @@
 Kademlia DHT routing table implementation.
 """
 
-from collections import OrderedDict
+from collections import (
+    OrderedDict,
+)
 import logging
 import time
 
 import trio
 
-from libp2p.abc import IHost
+from libp2p.abc import (
+    IHost,
+)
 from libp2p.kad_dht.utils import (
     xor_distance,
 )
@@ -238,12 +242,9 @@ class KBucket:
         if not peer_info:
             raise ValueError(f"Peer {peer_id} not in bucket")
 
-        # Default protocol ID for Kademlia DHT
-        protocol_id = PROTOCOL_ID
-
         try:
             # Open a stream to the peer with the DHT protocol
-            stream = await self.host.new_stream(peer_id, [protocol_id])
+            stream = await self.host.new_stream(peer_id, [PROTOCOL_ID])
 
             try:
                 # Create ping protobuf message