diff --git a/src/modules/first-leg/types/inboundBilling.ts b/src/modules/first-leg/types/inboundBilling.ts
index 101a2a5..51d3db9 100644
--- a/src/modules/first-leg/types/inboundBilling.ts
+++ b/src/modules/first-leg/types/inboundBilling.ts
@@ -68,9 +68,9 @@ export interface MerchantInboundFeeSnapshot {
   chargeRuleId: string
   ruleCode: string
   chargeRuleVersion: number
-  carrierRateId: string
+  carrierRateId: string | null
   rateCode: string
-  carrierRateVersion: number
+  carrierRateVersion: number | null
   customerId: string
   customerName: string
   originWarehouseId: string