diff --git a/src/models/stratum-messages/AuthorizationMessage.ts b/src/models/stratum-messages/AuthorizationMessage.ts
index 150c810..324007a 100644
--- a/src/models/stratum-messages/AuthorizationMessage.ts
+++ b/src/models/stratum-messages/AuthorizationMessage.ts
@@ -1,5 +1,5 @@
 import { Expose, Transform } from 'class-transformer';
-import { ArrayMaxSize, ArrayMinSize, IsArray, IsString, MaxLength } from 'class-validator';
+import { ArrayMaxSize, ArrayMinSize, IsArray, IsOptional, IsString, MaxLength } from 'class-validator';
 
 import { eRequestMethod } from '../enums/eRequestMethod';
 import { IsBitcoinAddress } from '../validators/bitcoin-address.validator';
@@ -35,7 +35,8 @@ export class AuthorizationMessage extends StratumBaseMessage {
         return obj.params[1];
     })
     @MaxLength(64)
-    public password: string;
+    @IsOptional()
+    public password?: string;
 
     constructor() {
         super();