diff --git a/src/components/order-form/form/helper.ts b/src/components/order-form/form/helper.ts
index 53f8bd8..63ea809 100644
--- a/src/components/order-form/form/helper.ts
+++ b/src/components/order-form/form/helper.ts
@@ -1,6 +1,7 @@
 import { useTranslation } from "react-i18next";
 import { getConfigValue } from '@brojs/cli';
 import { InputProps, SelectProps } from "@chakra-ui/react";
+import dayjs from "dayjs";
 
 import { Order } from "../../../models/landing";
 
@@ -51,8 +52,8 @@ export const formatFormValues = ({ phone, carNumber, carBody, carColor, carLocat
     },
     washing: {
       location: carLocation,
-      begin: availableDatetimeBegin,
-      end: availableDatetimeEnd,
+      begin: dayjs(availableDatetimeBegin).toISOString(),
+      end: dayjs(availableDatetimeEnd).toISOString(),
     }
   };
 };