diff --git a/combo/apps/lingo/views.py b/combo/apps/lingo/views.py
index 80362a1a..053d7c7c 100644
--- a/combo/apps/lingo/views.py
+++ b/combo/apps/lingo/views.py
@@ -572,7 +572,7 @@ class CallbackView(PaymentView):
         return self.handle_callback(request, request.environ['QUERY_STRING'], **kwargs)
 
     def post(self, request, *args, **kwargs):
-        return self.handle_callback(request, request.body, **kwargs)
+        return self.handle_callback(request, force_text(request.body), **kwargs)
 
     @csrf_exempt
     def dispatch(self, *args, **kwargs):
@@ -590,7 +590,7 @@ class ReturnView(PaymentView):
         return self.handle_return(request, request.environ['QUERY_STRING'], **kwargs)
 
     def post(self, request, *args, **kwargs):
-        return self.handle_return(request, request.body, **kwargs)
+        return self.handle_return(request, force_text(request.body), **kwargs)
 
     def handle_return(self, request, backend_response, **kwargs):
         transaction = None