diff --git a/package-lock.json b/package-lock.json
index b2a6666..61cfaeb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "bybit-api",
-  "version": "2.3.0",
+  "version": "3.1.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "bybit-api",
-      "version": "2.3.0",
+      "version": "3.1.1",
       "license": "MIT",
       "dependencies": {
         "axios": "^0.21.0",
diff --git a/package.json b/package.json
index b4dc95a..42be513 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bybit-api",
-  "version": "3.1.0",
+  "version": "3.1.1",
   "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/constants/enum.ts b/src/constants/enum.ts
index 4843930..8526efc 100644
--- a/src/constants/enum.ts
+++ b/src/constants/enum.ts
@@ -18,6 +18,7 @@ export const API_ERROR_CODE = {
   PARAMS_MISSING_OR_WRONG: 10001,
   INVALID_API_KEY_OR_PERMISSIONS: 10003,
   INCORRECT_API_KEY_PERMISSIONS: 10005,
+  INCORRECT_PRIVATE_OPERATIONS: 3303001,
   /** Account not unified margin, update required */
   ACCOUNT_NOT_UNIFIED: 10020,
   BALANCE_INSUFFICIENT_SPOT_V3: 12131,