diff --git a/src/http-client.js b/src/http-client.js
index f58275e0..7ef1be38 100644
--- a/src/http-client.js
+++ b/src/http-client.js
@@ -162,11 +162,11 @@ const checkParams = (name, payload, requires = []) => {
 }
 
 const spotP = () => {
-    return `x-B3AUXNYV${uuid22()}`
+    return `x-TKT5PX2F${uuid22()}`
 }
 
 const futuresP = () => {
-    return `x-ftGmvgAN${uuid22()}`
+    return `x-cvBPrNm9${uuid22()}`
 }
 
 /**
diff --git a/test/static-tests.js b/test/static-tests.js
index 811511e8..86184b06 100644
--- a/test/static-tests.js
+++ b/test/static-tests.js
@@ -166,8 +166,8 @@ test.serial('[REST] Futures CancelOrder', async t => {
     t.is(obj.orderId, '34234234')
 })
 
-const CONTRACT_PREFIX = 'x-ftGmvgAN'
-const SPOT_PREFIX = 'x-B3AUXNYV'
+const CONTRACT_PREFIX = 'x-cvBPrNm9'
+const SPOT_PREFIX = 'x-TKT5PX2F'
 
 test.serial('[REST] MarketBuy', async t => {
     await binance.order({ symbol: 'LTCUSDT', side: 'BUY', type: 'MARKET', quantity: 0.5 })