diff --git a/src/modules/invoice/dto/create-invoice.dto.ts b/src/modules/invoice/dto/create-invoice.dto.ts
index eeff00e..fde926f 100644
--- a/src/modules/invoice/dto/create-invoice.dto.ts
+++ b/src/modules/invoice/dto/create-invoice.dto.ts
@@ -83,9 +83,10 @@ export class CreateInvoiceDto {
   approvalDeadline?: string;
 
 
-  @ApiPropertyOptional()
+  @IsOptional()
   @IsString()
-  paymentMethod?: string
+  @ApiPropertyOptional()
+  paymentMethod?: string;
 
 
   @IsOptional()