diff --git a/apps/payment/management/commands/send_transactions_to_roistat.py b/apps/payment/management/commands/send_transactions_to_roistat.py
index af53c7ee..3db2e864 100644
--- a/apps/payment/management/commands/send_transactions_to_roistat.py
+++ b/apps/payment/management/commands/send_transactions_to_roistat.py
@@ -22,7 +22,7 @@ class Command(BaseCommand):
         start_id = options.get('start_id')
         payments = Payment.objects.filter(id__gte=start_id, status__in=Payment.PW_PAID_STATUSES)
         for payment in payments:
-            logger.info('TRANSACTION: ' + payment.id)
+            logger.info('TRANSACTION: ' + str(payment.id))
 
             pingback = Pingback(payment.data)
             splitted = pingback.get_product().get_id().split('_')