diff --git a/examples/rest-rawv3auth.ts b/examples/rest-raw-v3sign.ts
similarity index 100%
rename from examples/rest-rawv3auth.ts
rename to examples/rest-raw-v3sign.ts
diff --git a/examples/rest-v5-private.ts b/examples/rest-v5-private.ts
new file mode 100644
index 0000000..bc66ec1
--- /dev/null
+++ b/examples/rest-v5-private.ts
@@ -0,0 +1,27 @@
+import { RestClientV5 } from '../src/index';
+
+// or
+// import { RestClientV5 } from 'bybit-api';
+
+const key = process.env.API_KEY_COM;
+const secret = process.env.API_SECRET_COM;
+
+const client = new RestClientV5({
+  key,
+  secret,
+  strict_param_validation: true,
+});
+
+(async () => {
+  try {
+    /** Simple example for a private REST API call with bybit's V5 REST APIs */
+    const response = await client.getPositionInfo({
+      category: 'option',
+      symbol: 'BTCUSDT',
+    });
+
+    console.log('response:', response);
+  } catch (e) {
+    console.error('request failed: ', e);
+  }
+})();
diff --git a/src/types/request/v5-asset.ts b/src/types/request/v5-asset.ts
index a1af232..8867c03 100644
--- a/src/types/request/v5-asset.ts
+++ b/src/types/request/v5-asset.ts
@@ -125,7 +125,7 @@ export interface WithdrawParamsV5 {
   amount: string;
   timestamp: number;
   forceChain?: number;
-  accountType?: string;
+  accountType?: 'SPOT' | 'FUND';
 }
 
 export interface CreateSubMemberParamsV5 {