diff --git a/eopayment/dummy.py b/eopayment/dummy.py
index 0d6a3ca..ef08517 100644
--- a/eopayment/dummy.py
+++ b/eopayment/dummy.py
@@ -6,7 +6,8 @@ def N_(message): return message
 
 from six.moves.urllib.parse import parse_qs, urlencode
 
-from .common import PaymentCommon, URL, PaymentResponse, PAID, ERROR, WAITING, ResponseError
+from .common import (PaymentCommon, URL, PaymentResponse, PAID, ERROR, WAITING,
+        ResponseError, force_text)
 
 __all__ = [ 'Payment' ]
 
@@ -117,7 +118,7 @@ class Payment(PaymentCommon):
         return transaction_id, URL, url
 
     def response(self, query_string, logger=LOGGER, **kwargs):
-        form = parse_qs(query_string)
+        form = parse_qs(force_text(query_string))
         if not 'transaction_id' in form:
             raise ResponseError()
         transaction_id = form.get('transaction_id',[''])[0]