diff --git a/src/main/kotlin/com/ecwid/apiclient/v3/dto/extrafield/result/FetchedCustomersConfig.kt b/src/main/kotlin/com/ecwid/apiclient/v3/dto/extrafield/result/FetchedCustomersConfig.kt
index 57a873b6..225e7f4d 100644
--- a/src/main/kotlin/com/ecwid/apiclient/v3/dto/extrafield/result/FetchedCustomersConfig.kt
+++ b/src/main/kotlin/com/ecwid/apiclient/v3/dto/extrafield/result/FetchedCustomersConfig.kt
@@ -12,6 +12,7 @@ data class FetchedCustomersConfig(
 	val entityTypes: List<ExtrafieldEntityType>? = null,
 	val type: ExtrafieldType? = null,
 	val shownOnOrderDetails: Boolean? = null,
+	val linkedWithCheckoutField: Boolean? = null,
 	val createdDate: Date? = null,
 	val lastModifiedDate: Date? = null,
 ) : ApiFetchedDTO {
diff --git a/src/test/kotlin/com/ecwid/apiclient/v3/rule/NonUpdatablePropertyRules.kt b/src/test/kotlin/com/ecwid/apiclient/v3/rule/NonUpdatablePropertyRules.kt
index 7484c017..ff0e84f9 100644
--- a/src/test/kotlin/com/ecwid/apiclient/v3/rule/NonUpdatablePropertyRules.kt
+++ b/src/test/kotlin/com/ecwid/apiclient/v3/rule/NonUpdatablePropertyRules.kt
@@ -326,6 +326,7 @@ val nonUpdatablePropertyRules: List<NonUpdatablePropertyRule<*, *>> = listOf(
 	ReadOnly(FetchedInstantSiteRedirect::id),
 
 	ReadOnly(FetchedCustomersConfig::entityTypes),
+	ReadOnly(FetchedCustomersConfig::linkedWithCheckoutField),
 	ReadOnly(FetchedCustomersConfig::createdDate),
 	ReadOnly(FetchedCustomersConfig::lastModifiedDate),
 )
diff --git a/src/test/kotlin/com/ecwid/apiclient/v3/rule/nullablepropertyrules/FetchedCustomersConfigRules.kt b/src/test/kotlin/com/ecwid/apiclient/v3/rule/nullablepropertyrules/FetchedCustomersConfigRules.kt
index 5f4f7d4d..3d5af974 100644
--- a/src/test/kotlin/com/ecwid/apiclient/v3/rule/nullablepropertyrules/FetchedCustomersConfigRules.kt
+++ b/src/test/kotlin/com/ecwid/apiclient/v3/rule/nullablepropertyrules/FetchedCustomersConfigRules.kt
@@ -10,6 +10,7 @@ val fetchedCustomersConfigNullablePropertyRules: List<NullablePropertyRule<*, *>
 	AllowNullable(FetchedCustomersConfig::entityTypes),
 	AllowNullable(FetchedCustomersConfig::type),
 	AllowNullable(FetchedCustomersConfig::shownOnOrderDetails),
+	AllowNullable(FetchedCustomersConfig::linkedWithCheckoutField),
 	AllowNullable(FetchedCustomersConfig::createdDate),
 	AllowNullable(FetchedCustomersConfig::lastModifiedDate),
 )