diff --git a/src/PayuniApi.php b/src/PayuniApi.php
index d751590..fc46e66 100644
--- a/src/PayuniApi.php
+++ b/src/PayuniApi.php
@@ -43,7 +43,7 @@ public function __construct(string $key, string $iv, string $type = '')
      * @author    Yifan
      * @ dateTime 2022-08-23
      */
-    public function UniversalTrade(array $encryptInfo, string $tradeType, int $workType = 1) {
+    public function UniversalTrade(array $encryptInfo, string $tradeType) {
         $this->encryptInfo = $encryptInfo;
         $contrast = [
             'upp' => 'upp',
@@ -126,7 +126,7 @@ public function UniversalTrade(array $encryptInfo, string $tradeType, int $workT
                         throw new Exception('Unknown params');
                         break;
                 }
-                $this->SetParams($contrast[$tradeType], $workType);
+                $this->SetParams($contrast[$tradeType]);
                 if ($tradeType == 'upp') {
                     $this->HtmlApi();
                     exit;
@@ -208,17 +208,10 @@ private function CheckParams() {
      * @author    Yifan
      * @ dateTime 2022-08-23
      */
-    private function SetParams(string $type = '', int $workType = 1) {
-        if (isset($this->encryptInfo['TradeGateway'])) {
-            $tradeGateway = $this->encryptInfo['TradeGateway'];
-            unset($this->encryptInfo['TradeGateway']);
-        }
+    private function SetParams(string $type = '') {
         $this->parameter['MerID']       = $this->encryptInfo['MerID'];
         $this->parameter['EncryptInfo'] = $this->Encrypt();
         $this->parameter['HashInfo']    = $this->HashInfo($this->parameter['EncryptInfo']);
-        if ( in_array($workType,[4,6])) {
-            $this->parameter['TradeGateway']= $tradeGateway;
-        }
         $this->curlUrl = $this->apiUrl . $type;
     }
     /**