diff --git a/package-lock.json b/package-lock.json
index 5f09f6b..76fb1b3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "bybit-api",
-  "version": "4.0.0-beta.8",
+  "version": "4.0.0-beta.9",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "bybit-api",
-      "version": "4.0.0-beta.8",
+      "version": "4.0.0-beta.9",
       "license": "MIT",
       "dependencies": {
         "axios": "^1.7.9",
diff --git a/package.json b/package.json
index d9842b4..ad975ca 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bybit-api",
-  "version": "4.0.0-beta.8",
+  "version": "4.0.0-beta.9",
   "description": "Complete & robust Node.js SDK for Bybit's REST APIs and WebSockets, with TypeScript & strong end to end tests.",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
diff --git a/src/types/response/v5-trade.ts b/src/types/response/v5-trade.ts
index f7eba1a..0e591d9 100644
--- a/src/types/response/v5-trade.ts
+++ b/src/types/response/v5-trade.ts
@@ -78,16 +78,18 @@ export interface BatchCreateOrderResultV5 {
   createAt: string;
 }
 
+export interface BatchOrdersRetExtInfoV5 {
+  list: {
+    code: number;
+    msg: string;
+  }[];
+}
+
 export interface BatchOrdersResponseV5<T extends unknown[]> {
   result: {
     list: T;
   };
-  retExtInfo: {
-    list: {
-      code: number;
-      msg: string;
-    }[];
-  };
+  retExtInfo: BatchOrdersRetExtInfoV5;
 }
 
 export interface BatchAmendOrderResultV5 {
diff --git a/src/types/websockets/ws-api.ts b/src/types/websockets/ws-api.ts
index 962a232..7431dac 100644
--- a/src/types/websockets/ws-api.ts
+++ b/src/types/websockets/ws-api.ts
@@ -12,10 +12,12 @@ import {
   BatchCancelOrderResultV5,
   BatchCreateOrderResultV5,
   BatchOrdersResponseV5,
+  BatchOrdersRetExtInfoV5,
   OrderResultV5,
 } from '../response';
 import { WsKey } from './ws-general';
 
+// When new WS API operations are added, make sure to also update WS_API_Operations[] below
 export type WSAPIOperation =
   | 'order.create'
   | 'order.amend'
@@ -24,6 +26,15 @@ export type WSAPIOperation =
   | 'order.amend-batch'
   | 'order.cancel-batch';
 
+export const WS_API_Operations: WSAPIOperation[] = [
+  'order.create',
+  'order.amend',
+  'order.cancel',
+  'order.create-batch',
+  'order.amend-batch',
+  'order.cancel-batch',
+];
+
 export type WsOperation =
   | 'subscribe'
   | 'unsubscribe'
@@ -31,12 +42,6 @@ export type WsOperation =
   | 'ping'
   | 'pong';
 
-export const WS_API_Operations: WSAPIOperation[] = [
-  'order.create',
-  'order.amend',
-  'order.cancel',
-];
-
 export interface WsRequestOperationBybit<TWSTopic extends string> {
   req_id: string;
   op: WsOperation;
@@ -100,17 +105,18 @@ export interface WsAPITopicRequestParamMap {
   'order.create': OrderParamsV5;
   'order.amend': AmendOrderParamsV5;
   'order.cancel': CancelOrderParamsV5;
+
   'order.create-batch': {
     category: 'option' | 'linear';
-    orders: BatchOrderParamsV5[];
+    request: BatchOrderParamsV5[];
   };
   'order.amend-batch': {
     category: 'option' | 'linear';
-    orders: BatchAmendOrderParamsV5[];
+    request: BatchAmendOrderParamsV5[];
   };
   'order.cancel-batch': {
     category: 'option' | 'linear';
-    orders: BatchCancelOrderParamsV5[];
+    request: BatchCancelOrderParamsV5[];
   };
 }
 
@@ -121,18 +127,26 @@ export interface WsAPIOperationResponseMap {
   'order.create': WSAPIResponse<OrderResultV5, 'order.create'>;
   'order.amend': WSAPIResponse<OrderResultV5, 'order.amend'>;
   'order.cancel': WSAPIResponse<OrderResultV5, 'order.cancel'>;
+
   'order.create-batch': WSAPIResponse<
-    BatchOrdersResponseV5<BatchCreateOrderResultV5[]>,
+    { list: BatchCreateOrderResultV5[] },
     'order.create-batch'
-  >;
+  > & {
+    retExtInfo: BatchOrdersRetExtInfoV5;
+  };
   'order.amend-batch': WSAPIResponse<
-    BatchOrdersResponseV5<BatchAmendOrderResultV5[]>,
+    { list: BatchAmendOrderResultV5[] },
     'order.amend-batch'
-  >;
+  > & {
+    retExtInfo: BatchOrdersRetExtInfoV5;
+  };
   'order.cancel-batch': WSAPIResponse<
-    BatchOrdersResponseV5<BatchCancelOrderResultV5[]>,
+    { list: BatchCancelOrderResultV5[] },
     'order.cancel-batch'
-  >;
+  > & {
+    retExtInfo: BatchOrdersRetExtInfoV5;
+  };
+
   ping: {
     retCode: 0 | number;
     retMsg: 'OK' | string;