diff --git a/session.go b/session.go
index c20c73d..aa4da6e 100644
--- a/session.go
+++ b/session.go
@@ -7,6 +7,7 @@ import (
 	"net/http/cookiejar"
 	"net/url"
 	"reflect"
+	"runtime"
 	"time"
 
 	"golang.org/x/net/publicsuffix"
@@ -252,3 +253,13 @@ func (ses *Session) Options(url string) *Workflow {
 func (ses *Session) CloseIdleConnections() {
 	ses.client.Transport.(*http.Transport).CloseIdleConnections()
 }
+
+// EnsureTransporterFinalized will ensure that when the HTTP client is GCed
+// the runtime will close the idle connections (so that they won't leak)
+// this function was adopted from Hashicorp's go-cleanhttp package
+// 暂时不用, 标记到以后是否起作用
+func EnsureTransporterFinalized(httpTransport *http.Transport) {
+	runtime.SetFinalizer(&httpTransport, func(transportInt **http.Transport) {
+		(*transportInt).CloseIdleConnections()
+	})
+}