diff --git a/libp2p/crypto/ed25519.py b/libp2p/crypto/ed25519.py
index 11a1668..cde2641 100644
--- a/libp2p/crypto/ed25519.py
+++ b/libp2p/crypto/ed25519.py
@@ -1,12 +1,12 @@
 from Crypto.Hash import SHA256
+
+from libp2p.crypto.keys import KeyPair, KeyType, PrivateKey, PublicKey
 from nacl.exceptions import BadSignatureError
 from nacl.public import PrivateKey as PrivateKeyImpl
 from nacl.public import PublicKey as PublicKeyImpl
 from nacl.signing import SigningKey, VerifyKey
 import nacl.utils as utils
 
-from libp2p.crypto.keys import KeyPair, KeyType, PrivateKey, PublicKey
-
 
 class Ed25519PublicKey(PublicKey):
     def __init__(self, impl: PublicKeyImpl) -> None:
diff --git a/libp2p/io/exceptions.py b/libp2p/io/exceptions.py
index e49ac2d..d4e1dfa 100644
--- a/libp2p/io/exceptions.py
+++ b/libp2p/io/exceptions.py
@@ -22,5 +22,6 @@ class MissingLengthException(MsgioException):
 class MissingMessageException(MsgioException):
     pass
 
+
 class DecryptionFailedException(MsgioException):
     pass
diff --git a/libp2p/security/secio/transport.py b/libp2p/security/secio/transport.py
index f3e3fde..3667e7b 100644
--- a/libp2p/security/secio/transport.py
+++ b/libp2p/security/secio/transport.py
@@ -3,8 +3,8 @@ import io
 import itertools
 from typing import Optional, Tuple
 
-import multihash
 from crypto.authenticated_encryption import InvalidMACException
+import multihash
 
 from libp2p.crypto.authenticated_encryption import (
     EncryptionParameters as AuthenticatedEncryptionParameters,