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 9b28bdb05..f4d5eccb5 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
@@ -11,5 +11,10 @@ enum class AttributeType {
 	EBAY,
 	EBAY_REQUIRED,
 	PRICE_PER_UNIT,
-	UNITS_IN_PRODUCT
+	UNITS_IN_PRODUCT,
+	EXTERNAL_EAN,
+	EXTERNAL_ISBN,
+	EXTERNAL_ITF,
+	EXTERNAL_JAN,
+	EXTERNAL_CUSTOM
 }