diff --git a/ssh-audit.py b/ssh-audit.py
index e9243ec..0ae8111 100755
--- a/ssh-audit.py
+++ b/ssh-audit.py
@@ -133,7 +133,7 @@ class Output(object):
 
 class OutputBuffer(list):
 	def __enter__(self):
-		self.__buf = io.StringIO()
+		self.__buf = utils.StringIO()
 		self.__stdout = sys.stdout
 		sys.stdout = self.__buf
 		return self
@@ -389,7 +389,7 @@ class SSH1(object):
 class ReadBuf(object):
 	def __init__(self, data=None):
 		super(ReadBuf, self).__init__()
-		self._buf = io.BytesIO(data) if data else io.BytesIO()
+		self._buf = utils.BytesIO(data) if data else utils.BytesIO()
 		self._len = len(data) if data else 0
 	
 	@property
@@ -1538,11 +1538,25 @@ def output(banner, header, kex=None, pkm=None):
 	output_fingerprint(kex, pkm, True, maxlen)
 
 
-def parse_int(v):
-	try:
-		return int(v)
-	except:
-		return 0
+class Utils(object):
+	PY2 = sys.version_info[0] == 2
+	
+	@classmethod
+	def wrap(cls):
+		o = cls()
+		if cls.PY2:
+			import StringIO
+			o.StringIO = o.BytesIO = StringIO.StringIO
+		else:
+			o.StringIO, o.BytesIO = io.StringIO, io.BytesIO
+		return o
+	
+	@staticmethod
+	def parse_int(v):
+		try:
+			return int(v)
+		except:
+			return 0
 
 
 def parse_args():
@@ -1576,7 +1590,7 @@ def parse_args():
 	s = args[0].split(':')
 	host, port = s[0].strip(), 22
 	if len(s) > 1:
-		port = parse_int(s[1])
+		port = utils.parse_int(s[1])
 	if not host or port <= 0:
 		usage('port {0} is not valid'.format(port))
 	conf.host = host
@@ -1625,6 +1639,7 @@ def audit(conf, sshv=None):
 		output(banner, header, kex=kex)
 
 
+utils = Utils.wrap()
 if __name__ == '__main__':
 	out = Output()
 	conf = parse_args()