diff --git a/mobile/plugins/payment/wxpay.php b/mobile/plugins/payment/wxpay.php
index 6ea10ed..64351bc 100755
--- a/mobile/plugins/payment/wxpay.php
+++ b/mobile/plugins/payment/wxpay.php
@@ -255,7 +255,7 @@ class wxpay
             'package' => $package,
             'signType' => $signType,
             'paySign' => $paySign,
-            'total_fee' => $total_fee,
+            'total_fee' => $total_fee.'',
         );
         $jsApiParameters = json_encode($jsApiParameters);