diff --git a/src/dtos/sms.mo.dto.ts b/src/dtos/sms.mo.dto.ts
index 2bd6924..7e2c9b0 100644
--- a/src/dtos/sms.mo.dto.ts
+++ b/src/dtos/sms.mo.dto.ts
@@ -4,12 +4,14 @@ import {
   ValidateNested,
   IsNotEmpty,
   IsDateString,
+  IsOptional,
 } from 'class-validator';
 import { Type } from 'class-transformer';
 
 export class InboundSMSMessageDto {
   @ApiProperty({ example: '2025-10-30T14:00:00Z' })
   @IsDateString()
+  @IsOptional()
   dateTime: string;
 
   @ApiProperty({ example: '+33612345678' })
@@ -20,6 +22,7 @@ export class InboundSMSMessageDto {
   @ApiProperty({ example: 'mes1234' })
   @IsString()
   @IsNotEmpty()
+  @IsOptional()
   messageId: string;
 
   @ApiProperty({