diff --git a/package.json b/package.json
index fd2eef2..1def7df 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bybit-api",
-  "version": "3.9.2",
+  "version": "3.9.3",
   "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/request/v5-trade.ts b/src/types/request/v5-trade.ts
index 4403520..123a1a7 100644
--- a/src/types/request/v5-trade.ts
+++ b/src/types/request/v5-trade.ts
@@ -17,6 +17,7 @@ export interface OrderParamsV5 {
   side: OrderSideV5;
   orderType: OrderTypeV5;
   qty: string;
+  marketUnit?: 'baseCoin' | 'quoteCoin';
   price?: string;
   triggerDirection?: 1 | 2;
   orderFilter?: OrderFilterV5;