diff --git a/model/yclients.go b/model/yclients.go
index 7ac1617..60cc2e9 100644
--- a/model/yclients.go
+++ b/model/yclients.go
@@ -152,3 +152,13 @@ type YclientsClientAgreements struct {
 	IsNewsletterAllowed             bool `json:"is_newsletter_allowed"`
 	IsPersonalDataProcessingAllowed bool `json:"is_personal_data_processing_allowed"`
 }
+
+type YclientsCustomFieldsType string
+
+const (
+	TypeYclientsText     YclientsCustomFieldsType = "text"     // строка длиной до 255 символов
+	TypeYclientsNumber   YclientsCustomFieldsType = "number"   // число
+	TypeYclientsSelect   YclientsCustomFieldsType = "select"   // список
+	TypeYclientsDate     YclientsCustomFieldsType = "date"     // Дата (Y-m-d)
+	TypeYclientsDateTime YclientsCustomFieldsType = "datetime" // Дата и время (Y-m-d H:i:s)
+)