diff --git a/eopayment/ogone.py b/eopayment/ogone.py
index 484df8c..af0600d 100644
--- a/eopayment/ogone.py
+++ b/eopayment/ogone.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 import hashlib
 import string
+import six
 from six.moves.urllib import parse as urlparse
 from decimal import Decimal, ROUND_HALF_UP
 
@@ -499,7 +500,7 @@ class Payment(PaymentCommon):
         # arrondi comptable francais
         amount = amount.quantize(Decimal('1.'), rounding=ROUND_HALF_UP)
         params = {
-                'AMOUNT': unicode(amount),
+                'AMOUNT': force_text(amount),
                 'ORDERID': reference,
                 'PSPID': self.pspid,
                 'LANGUAGE': language,
@@ -533,7 +534,10 @@ class Payment(PaymentCommon):
         return reference, FORM, form
 
     def response(self, query_string, **kwargs):
-        params = urlparse.parse_qs(query_string, True)
+        if six.PY3:
+            params = urlparse.parse_qs(query_string, True, encoding='iso-8859-1')
+        else:
+            params = urlparse.parse_qs(query_string, True)
         params = dict((key.upper(), params[key][0]) for key in params)
         if not set(params) >= set(['ORDERID', 'PAYID', 'STATUS', 'NCERROR']):
             raise ResponseError()