diff --git a/addons/payment_sips/models/payment.py b/addons/payment_sips/models/payment.py
index 515bb08ee9797813c554917d8f0add56bdd9fb13..4b2122cec4568b7dc599fdbd45909e0020ff8ea4 100644
--- a/addons/payment_sips/models/payment.py
+++ b/addons/payment_sips/models/payment.py
@@ -81,7 +81,7 @@ class AcquirerSips(models.Model):
         if self.environment == 'prod':
             # For production environment, key version 2 is required
             merchant_id = getattr(self, 'sips_merchant_id')
-            key_version = '2'
+            key_version = self.env['ir.config_parameter'].sudo().get_param('sips.key_version', '2')
         else:
             # Test key provided by Atos Wordline works only with version 1
             merchant_id = '002001000000001'