diff --git a/shadowsocks/crypto/ctypes_openssl.py b/shadowsocks/crypto/ctypes_openssl.py
index 823dd90..696952a 100644
--- a/shadowsocks/crypto/ctypes_openssl.py
+++ b/shadowsocks/crypto/ctypes_openssl.py
@@ -158,4 +158,4 @@ def test():
 
 
 if __name__ == '__main__':
-    test()
\ No newline at end of file
+    test()
diff --git a/shadowsocks/crypto/m2.py b/shadowsocks/crypto/m2.py
index d69a468..d2a4927 100644
--- a/shadowsocks/crypto/m2.py
+++ b/shadowsocks/crypto/m2.py
@@ -36,8 +36,9 @@ def create_cipher(alg, key, iv, op, key_as_bytes=0, d=None, salt=None, i=1,
                   padding=1):
 
     import M2Crypto.EVP
-    return M2Crypto.EVP.Cipher(alg.replace('-', '_'), key, iv, op, key_as_bytes=0,
-                               d='md5', salt=None, i=1, padding=1)
+    return M2Crypto.EVP.Cipher(alg.replace('-', '_'), key, iv, op,
+                               key_as_bytes=0, d='md5', salt=None, i=1,
+                               padding=1)
 
 
 def err(alg, key, iv, op, key_as_bytes=0, d=None, salt=None, i=1, padding=1):