diff --git a/src/pages/bill/Create.tsx b/src/pages/bill/Create.tsx
index 7b888eb..eda6aba 100644
--- a/src/pages/bill/Create.tsx
+++ b/src/pages/bill/Create.tsx
@@ -65,6 +65,7 @@ const CreateBill: FC = () => {
             }
 
             values.dueDays = Number(values.dueDays)
+            values.waterRate = Number(values.waterRate)
 
             await createBill.mutateAsync(
                 { ...values, values: filteredValues },