diff --git a/shop/redsys.py b/shop/redsys.py
index 8292cc0..93378b5 100644
--- a/shop/redsys.py
+++ b/shop/redsys.py
@@ -25,7 +25,8 @@ class RedsysClient:
         self.settings = ShopSettings.load()
 
     def get_target_url(self):
-        if settings.DEBUG:
+        shop_settings = ShopSettings.load()
+        if shop_settings.debug:
             return self.DEBUG_ENVIRONMENT_URL
         return self.PROD_ENVIRONMENT_URL