diff --git a/src/types/request/v5-trade.ts b/src/types/request/v5-trade.ts
index 76aad5a..047e92f 100644
--- a/src/types/request/v5-trade.ts
+++ b/src/types/request/v5-trade.ts
@@ -19,6 +19,8 @@ export interface OrderParamsV5 {
   orderType: OrderTypeV5;
   qty: string;
   marketUnit?: 'baseCoin' | 'quoteCoin';
+  slippageToleranceType?: string;
+  slippageTolerance?: string;
   price?: string;
   triggerDirection?: 1 | 2;
   orderFilter?: OrderFilterV5;
diff --git a/src/types/response/v5-trade.ts b/src/types/response/v5-trade.ts
index 454823d..f7eba1a 100644
--- a/src/types/response/v5-trade.ts
+++ b/src/types/response/v5-trade.ts
@@ -42,6 +42,8 @@ export interface AccountOrderV5 {
   stopOrderType: StopOrderTypeV5;
   orderIv: string;
   marketUnit: 'baseCoin' | 'quoteCoin';
+  slippageToleranceType: string;
+  slippageTolerance: string;
   triggerPrice: string;
   takeProfit: string;
   stopLoss: string;
diff --git a/src/util/BaseRestClient.ts b/src/util/BaseRestClient.ts
index fb34e64..d7e639a 100644
--- a/src/util/BaseRestClient.ts
+++ b/src/util/BaseRestClient.ts
@@ -64,6 +64,7 @@ interface SignedRequest<T> {
 interface UnsignedRequest<T> {
   originalParams: T;
   paramsWithSign: T;
+  serializedParams: string;
   sign?: string;
   timestamp?: number;
   recvWindow?: number;
@@ -276,7 +277,9 @@ export default abstract class BaseRestClient {
       return {
         ...options,
         headers,
-        params: signResult.originalParams,
+        url: signResult.serializedParams
+          ? options.url + '?' + signResult.serializedParams
+          : options.url,
       };
     }
 
diff --git a/test/v5/private.read.test.ts b/test/v5/private.read.test.ts
index b84d47d..abb8625 100644
--- a/test/v5/private.read.test.ts
+++ b/test/v5/private.read.test.ts
@@ -188,7 +188,35 @@ describe('Private READ V5 REST API Endpoints', () => {
           accountType: accountType,
           coin: settleCoin,
         }),
-      ).toMatchObject({ ...successResponseObjectV3() });
+      ).toMatchObject({
+        ...successResponseObjectV3(),
+        // retMsg: '',
+      });
+    });
+
+    it('getAllCoinsBalance() unified with one symbol', async () => {
+      const result = await api.getAllCoinsBalance({
+        accountType: 'UNIFIED',
+        coin: 'USDT',
+      });
+
+      if (result.retCode !== 0) {
+        console.error(expect.getState().currentTestName, 'exception: ', result);
+      }
+
+      expect(result).toMatchObject({ ...successResponseObjectV3() });
+    });
+
+    it('getAllCoinsBalance() unified with multiple symbols', async () => {
+      const result = await api.getAllCoinsBalance({
+        accountType: 'UNIFIED',
+        coin: 'USDT,ETH',
+      });
+
+      if (result.retCode !== 0) {
+        console.error(expect.getState().currentTestName, 'exception: ', result);
+      }
+      expect(result).toMatchObject({ ...successResponseObjectV3() });
     });
 
     it('getTransferableCoinList()', async () => {