diff --git a/src/main/kotlin/com/ecwid/apiclient/v3/dto/producttype/enums/AttributeType.kt b/src/main/kotlin/com/ecwid/apiclient/v3/dto/producttype/enums/AttributeType.kt
index f4d5eccb..1283a416 100644
--- a/src/main/kotlin/com/ecwid/apiclient/v3/dto/producttype/enums/AttributeType.kt
+++ b/src/main/kotlin/com/ecwid/apiclient/v3/dto/producttype/enums/AttributeType.kt
@@ -16,5 +16,6 @@ enum class AttributeType {
 	EXTERNAL_ISBN,
 	EXTERNAL_ITF,
 	EXTERNAL_JAN,
-	EXTERNAL_CUSTOM
+	EXTERNAL_CUSTOM,
+	EXTERNAL_UPC
 }