diff --git a/tienda_ilusion/don_confiao/serializers/sales.py b/tienda_ilusion/don_confiao/serializers/sales.py
index 7d66f0f..51543fa 100644
--- a/tienda_ilusion/don_confiao/serializers/sales.py
+++ b/tienda_ilusion/don_confiao/serializers/sales.py
@@ -58,6 +58,7 @@ class CatalogSaleSerializer(serializers.ModelSerializer):
             "date",
             "catalogsaleline_set",
             "total",
+            "external_id",
         ]
 
     def create(self, validated_data):