diff --git a/src/models/stratum-messages/StratumBaseMessage.ts b/src/models/stratum-messages/StratumBaseMessage.ts
index 0e23398..921e706 100644
--- a/src/models/stratum-messages/StratumBaseMessage.ts
+++ b/src/models/stratum-messages/StratumBaseMessage.ts
@@ -1,8 +1,9 @@
-import { IsEnum, IsNumber } from 'class-validator';
+import { IsDefined, IsEnum, IsNumber, IsNumberString, isNumberString, IsOptional } from 'class-validator';
 
 import { eRequestMethod } from '../enums/eRequestMethod';
 
 export class StratumBaseMessage {
+    @IsDefined()
     id?: number | string = null;
     @IsEnum(eRequestMethod)
     method: eRequestMethod;