diff --git a/mail/smtp.go b/mail/smtp.go
index 9dc93fd..b63871f 100644
--- a/mail/smtp.go
+++ b/mail/smtp.go
@@ -3,29 +3,28 @@ package mail
 import (
 	"crypto/tls"
 	"github.com/argcv/stork/config"
-	"gopkg.in/gomail.v2"
+	"github.com/go-mail/mail"
 	"io"
 	"sync"
 	"time"
 )
 
-// for future update,
-// please refer to this example:
-// https://github.com/go-gomail/gomail/blob/master/example_test.go#L1
+// active fork
+// https://github.com/go-mail/mail
 type SMTPSession struct {
-	Dialer *gomail.Dialer
+	Dialer *mail.Dialer
 	Config *config.SMTPConfig
 
 	isClosed   bool
 	closeSch   *SMTPCloseSch
-	sendCloser gomail.SendCloser
+	sendCloser mail.SendCloser
 }
 
 func (s *SMTPSession) NewMessage() (*SMTPMessage) {
 	m := &SMTPMessage{
 		Dialer:  s.Dialer,
 		Config:  s.Config,
-		Message: gomail.NewMessage(),
+		Message: mail.NewMessage(),
 
 		locker: &sync.Mutex{},
 		ss: s,
@@ -34,7 +33,7 @@ func (s *SMTPSession) NewMessage() (*SMTPMessage) {
 	return m
 }
 
-func (s *SMTPSession) Dial(f func(gomail.SendCloser) error) error {
+func (s *SMTPSession) Dial(f func(mail.SendCloser) error) error {
 	s.closeSch.Activate()
 	err := s.closeSch.SafeExec(func() error {
 		if s.isClosed {
@@ -64,7 +63,7 @@ func (s *SMTPSession) close() error {
 }
 
 func NewSMTPSession(c config.SMTPConfig) (s *SMTPSession, err error) {
-	dialer := gomail.NewDialer(c.Host, c.Port, c.User, c.Pass)
+	dialer := mail.NewDialer(c.Host, c.Port, c.User, c.Pass)
 	if c.Option.InsecureSkipVerify {
 		dialer.TLSConfig = &tls.Config{InsecureSkipVerify: true}
 	}
@@ -82,8 +81,8 @@ func NewSMTPSession(c config.SMTPConfig) (s *SMTPSession, err error) {
 }
 
 type SMTPMessage struct {
-	Dialer  *gomail.Dialer
-	Message *gomail.Message
+	Dialer  *mail.Dialer
+	Message *mail.Message
 	Config  *config.SMTPConfig
 
 	locker *sync.Mutex
@@ -148,7 +147,7 @@ func (m *SMTPMessage) HtmlBody(body string) *SMTPMessage {
 
 func (m *SMTPMessage) Attach(path string, name ...string) *SMTPMessage {
 	if len(name) > 0 {
-		m.Message.Attach(path, gomail.Rename(name[0]))
+		m.Message.Attach(path, mail.Rename(name[0]))
 	} else {
 		m.Message.Attach(path)
 	}
@@ -156,7 +155,7 @@ func (m *SMTPMessage) Attach(path string, name ...string) *SMTPMessage {
 }
 
 func (m *SMTPMessage) AttachBytes(name string, data []byte) *SMTPMessage {
-	m.Message.Attach(name, gomail.SetCopyFunc(func(w io.Writer) error {
+	m.Message.Attach(name, mail.SetCopyFunc(func(w io.Writer) error {
 		_, err := w.Write(data)
 		return err
 	}))
@@ -187,7 +186,7 @@ func (m *SMTPMessage) AddToHeader(field string, value ...string) *SMTPMessage {
 	return m
 }
 
-func (m *SMTPMessage) AddAlternative(contentType, body string, settings ...gomail.PartSetting) *SMTPMessage {
+func (m *SMTPMessage) AddAlternative(contentType, body string, settings ...mail.PartSetting) *SMTPMessage {
 	m.Message.AddAlternative(contentType, body, settings...)
 	return m
 }
@@ -205,14 +204,14 @@ func (m *SMTPMessage) FormatAddress(address, name string) string {
 //	return locker
 //}
 
-func (m *SMTPMessage) SetBody(contentType, body string, settings ...gomail.PartSetting) *SMTPMessage {
+func (m *SMTPMessage) SetBody(contentType, body string, settings ...mail.PartSetting) *SMTPMessage {
 	m.Message.SetBody(contentType, body, settings...)
 	return m
 }
 
 func (m *SMTPMessage) Perform() error {
-	return m.ss.Dial(func(s gomail.SendCloser) (err error) {
-		err = gomail.Send(s, m.Message)
+	return m.ss.Dial(func(s mail.SendCloser) (err error) {
+		err = mail.Send(s, m.Message)
 		if err != nil {
 			m.ss.close()
 		}