diff --git a/src/controllers/product/product-controller.ts b/src/controllers/product/product-controller.ts
index 48db17b..3011810 100644
--- a/src/controllers/product/product-controller.ts
+++ b/src/controllers/product/product-controller.ts
@@ -59,7 +59,7 @@ type ProductCreate = {
   agentPrice: number;
   serviceCharge: number;
   vatIncluded?: boolean;
-  expenseType?: number;
+  expenseType?: string;
   productGroupId: string;
   remark?: string;
 
@@ -76,7 +76,7 @@ type ProductUpdate = {
   serviceCharge?: number;
   remark?: string;
   vatIncluded?: boolean;
-  expenseType?: number;
+  expenseType?: string;
   productGroupId?: string;
 
   registeredBranchId?: string;