diff --git a/package.json b/package.json
index a07eddc..6381c22 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bybit-api",
-  "version": "3.4.1",
+  "version": "3.4.2",
   "description": "Complete & robust node.js SDK for Bybit's REST APIs and WebSockets, with TypeScript & integration tests.",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
diff --git a/src/types/request/linear.ts b/src/types/request/linear.ts
index 6fb1f4f..3ec68fe 100644
--- a/src/types/request/linear.ts
+++ b/src/types/request/linear.ts
@@ -163,6 +163,7 @@ export interface LinearSetTradingStopRequest {
   sl_trigger_by?: string;
   sl_size?: number;
   tp_size?: number;
+  position_idx?: 0 | 1 | 2;
 }
 
 export interface LinearGetTradeRecordsRequest {