diff --git a/search.go b/search.go
index d3101f2..1258526 100644
--- a/search.go
+++ b/search.go
@@ -895,10 +895,10 @@ type CustomOrderSearchReturn struct {
 				Extensions []interface{} `json:"extensions"`
 			} `json:"foreignKeys"`
 		} `json:"extensions"`
-		Id                      string      `json:"id"`
-		CustomFields            interface{} `json:"customFields"`
-		BillingAddressVersionId string      `json:"billingAddressVersionId"`
-		ApiAlias                string      `json:"apiAlias"`
+		Id                      string                 `json:"id"`
+		CustomFields            map[string]interface{} `json:"customFields"`
+		BillingAddressVersionId string                 `json:"billingAddressVersionId"`
+		ApiAlias                string                 `json:"apiAlias"`
 	} `json:"data"`
 	Aggregations []interface{} `json:"aggregations"`
 	Errors       []struct {