diff --git a/platformapi/wxpayapi/wxpayapi.go b/platformapi/wxpayapi/wxpayapi.go
index 297b3a21..7637aae4 100644
--- a/platformapi/wxpayapi/wxpayapi.go
+++ b/platformapi/wxpayapi/wxpayapi.go
@@ -6,7 +6,6 @@ import (
 	"crypto/md5"
 	"crypto/sha256"
 	"crypto/tls"
-	"crypto/x509"
 	"encoding/xml"
 	"fmt"
 	"net/http"
@@ -397,7 +396,7 @@ func New(appID, appKey, mchID string, config ...*platformapi.APIConfig) *API {
 	}
 }
 
-func NewWithCertificate(appID, appKey, mchID string, certPEMBlock, keyPEMBlock, rootCa interface{}, config ...*platformapi.APIConfig) (a *API) {
+func NewWithCertificate(appID, appKey, mchID string, certPEMBlock, keyPEMBlock interface{}, config ...*platformapi.APIConfig) (a *API) {
 	var certs tls.Certificate
 	var err error
 	if binCertPEMBlock, ok := certPEMBlock.([]byte); ok {
@@ -406,12 +405,12 @@ func NewWithCertificate(appID, appKey, mchID string, certPEMBlock, keyPEMBlock,
 		certs, err = tls.LoadX509KeyPair(certPEMBlock.(string), keyPEMBlock.(string))
 	}
 	if err == nil {
-		pool := x509.NewCertPool()
-		pool.AppendCertsFromPEM(rootCa.([]byte))
+		// pool := x509.NewCertPool()
+		// pool.AppendCertsFromPEM(rootCa.([]byte))
 		a = New(appID, appKey, mchID, config...)
 		a.client.Transport = &http.Transport{
 			TLSClientConfig: &tls.Config{
-				RootCAs:      pool,
+				// RootCAs:      pool,
 				Certificates: []tls.Certificate{certs},
 			},
 		}
diff --git a/platformapi/wxpayapi/wxpayapi_test.go b/platformapi/wxpayapi/wxpayapi_test.go
index 2f23e5c9..49d06c79 100644
--- a/platformapi/wxpayapi/wxpayapi_test.go
+++ b/platformapi/wxpayapi/wxpayapi_test.go
@@ -23,7 +23,7 @@ func init() {
 	baseapi.Init(sugarLogger)
 	certPEMBlock, _ := ioutil.ReadFile("1390686702_20190115_cert/apiclient_cert.pem")
 	keyPEMBlock, _ := ioutil.ReadFile("1390686702_20190115_cert/apiclient_key.pem")
-	api = NewWithCertificate("wx70d0943e61e0d15c", "XKJPOIHJ233adf01KJIXlIeQDSDKFJAD", "1603491062", certPEMBlock, keyPEMBlock, nil)
+	api = NewWithCertificate("wx70d0943e61e0d15c", "XKJPOIHJ233adf01KJIXlIeQDSDKFJAD", "1603491062", certPEMBlock, keyPEMBlock)
 	// api = New("wx4b5930c13f8b1170", "XKJPOIHJ233adf01KJIXlIeQDSDKFJAD", "1390686702")
 }