diff --git a/webservice.go b/webservice.go
index ead20d5..47d750d 100644
--- a/webservice.go
+++ b/webservice.go
@@ -1,7 +1,6 @@
 package swservice
 
 import (
-	"bytes"
 	"crypto/hmac"
 	"crypto/sha1"
 	"crypto/tls"
@@ -9,7 +8,6 @@
 	"encoding/json"
 	"errors"
 	"fmt"
-	log "github.com/Sirupsen/logrus"
 	"io/ioutil"
 	"net"
 	"net/http"
@@ -18,6 +16,9 @@
 	"strings"
 	"sync"
 	"time"
+
+	log "github.com/Sirupsen/logrus"
+	"github.com/franela/goreq"
 )
 
 type WebSession struct {
@@ -146,10 +147,7 @@
 	return &transport
 }
 
-func (w *WebSession) DoPost(uri string, param map[string]string) (*http.Response, error) {
-	transport := w.httpConnectionPool.Get().(*http.Transport)
-	defer w.httpConnectionPool.Put(transport)
-	client := &http.Client{Transport: transport, Timeout: time.Duration(3) * time.Second}
+func (w *WebSession) DoPost(uri string, param map[string]string) (*goreq.Response, error) {
 	param["app_id"] = w.AppId
 	param["term_id"] = w.TermId
 	param["sign_method"] = "HMAC"
@@ -163,8 +161,13 @@
 	if err != nil {
 		return nil, err
 	}
-	var r *http.Response
-	r, err = client.Post(full_url, "application/json", bytes.NewReader(data))
+	var r *goreq.Response
+	r, err = goreq.Request{
+		Uri:         full_url,
+		Method:      "POST",
+		ContentType: "application/json",
+		Body:        data,
+		Timeout:     time.Duration(3) * time.Second}.Do()
 	if err != nil || r.StatusCode != 200 {
 		log.Errorf("Status=%v, err=%v", r, err)
 	}
@@ -296,9 +299,6 @@
 
 func (w *WebSession) CallService2(path string, params map[string]interface{}, timeout int,
 	sign_field ...string) (response *ServiceResponse, err error) {
-	transport := w.httpConnectionPool.Get().(*http.Transport)
-	defer w.httpConnectionPool.Put(transport)
-	client := http.Client{Transport: transport, Timeout: time.Duration(timeout) * time.Second}
 	err = nil
 	params["app_id"] = w.AppId
 	params["term_id"] = w.TermId
@@ -323,12 +323,14 @@
 
 	full_url := w.BaseUrl + path
 	log.Debugf("CallService: %v\n", full_url)
-	var r *http.Response
-	r, err = client.Post(full_url, "application/x-www-form-urlencoded",
-		bytes.NewReader([]byte(vl.Encode())))
-	if r != nil {
-		defer r.Body.Close()
-	}
+	var r *goreq.Response
+	r, err = goreq.Request{
+		Uri:         full_url,
+		Accept:      "application/json",
+		ContentType: "application/x-www-form-urlencoded",
+		Method:      "POST",
+		Timeout:     time.Duration(timeout) * time.Second,
+		Body:        vl.Encode()}.Do()
 	if err != nil {
 		log.Errorf("Status=%v, err=%v", r, err)
 		return
@@ -338,6 +340,9 @@
 		err = errors.New(fmt.Sprintf("Request Error, StatusCode : %v", r.StatusCode))
 		return
 	}
+	if r.Body != nil {
+		defer r.Body.Close()
+	}
 	body, err := ioutil.ReadAll(r.Body)
 	var s interface{}
 	err = json.Unmarshal(body, &s)