diff --git a/platformapi/wxpay/wxpay.go b/platformapi/wxpay/wxpay.go
index 8dcb64ee..afee6dd1 100644
--- a/platformapi/wxpay/wxpay.go
+++ b/platformapi/wxpay/wxpay.go
@@ -11,6 +11,7 @@ import (
 	"strings"
 	"time"
 
+	"git.rosy.net.cn/baseapi"
 	"git.rosy.net.cn/baseapi/platformapi"
 	"git.rosy.net.cn/baseapi/utils"
 	"github.com/clbanning/mxj"
@@ -224,8 +225,14 @@ func New(appID, appKey, mchID string, config ...*platformapi.APIConfig) *API {
 	}
 }
 
-func NewWithCertificate(appID, appKey, mchID string, certPEMBlock, keyPEMBlock []byte, config ...*platformapi.APIConfig) (a *API) {
-	certs, err := tls.X509KeyPair(certPEMBlock, keyPEMBlock)
+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 {
+		certs, err = tls.X509KeyPair(binCertPEMBlock, keyPEMBlock.([]byte))
+	} else {
+		certs, err = tls.LoadX509KeyPair(certPEMBlock.(string), keyPEMBlock.(string))
+	}
 	if err == nil {
 		a = New(appID, appKey, mchID, config...)
 		a.client.Transport = &http.Transport{
@@ -233,6 +240,8 @@ func NewWithCertificate(appID, appKey, mchID string, certPEMBlock, keyPEMBlock [
 				Certificates: []tls.Certificate{certs},
 			},
 		}
+	} else {
+		baseapi.SugarLogger.Warnf("NewWithCertificate failed with err:%v", err)
 	}
 	return a
 }