diff --git a/libp2p/kad_dht/common.py b/libp2p/kad_dht/common.py
index ccabb002..8b82ea97 100644
--- a/libp2p/kad_dht/common.py
+++ b/libp2p/kad_dht/common.py
@@ -7,4 +7,4 @@ ALPHA = 3  # Concurrency parameter
 PROTOCOL_ID = TProtocol("/ipfs/kad/1.0.0")
 QUERY_TIMEOUT = 10
 
-TTL = DEFAULT_TTL = 24 * 60 * 60 # 24 hours in seconds
\ No newline at end of file
+TTL = DEFAULT_TTL = 24 * 60 * 60  # 24 hours in seconds
diff --git a/libp2p/kad_dht/kad_dht.py b/libp2p/kad_dht/kad_dht.py
index 8a917bda..f82c0063 100644
--- a/libp2p/kad_dht/kad_dht.py
+++ b/libp2p/kad_dht/kad_dht.py
@@ -18,9 +18,6 @@ import varint
 from libp2p.abc import (
     IHost,
 )
-from libp2p.custom_types import (
-    TProtocol,
-)
 from libp2p.network.stream.net_stream import (
     INetStream,
 )
@@ -60,6 +57,7 @@ logger = logging.getLogger("kademlia-example.kad_dht")
 # Default parameters
 ROUTING_TABLE_REFRESH_INTERVAL = 60  # 1 min in seconds for testing
 
+
 class DHTMode(Enum):
     """DHT operation modes."""
 
diff --git a/libp2p/kad_dht/value_store.py b/libp2p/kad_dht/value_store.py
index c133fd00..488735e6 100644
--- a/libp2p/kad_dht/value_store.py
+++ b/libp2p/kad_dht/value_store.py
@@ -31,6 +31,7 @@ from .common import (
 # logger = logging.getLogger("libp2p.kademlia.value_store")
 logger = logging.getLogger("kademlia-example.value_store")
 
+
 class ValueStore:
     """
     Store for key-value pairs in a Kademlia DHT.