diff --git a/partnerapi/jtexpress/jtexpress.go b/partnerapi/jtexpress/jtexpress.go
index cc32ccf..4ff00f2 100644
--- a/partnerapi/jtexpress/jtexpress.go
+++ b/partnerapi/jtexpress/jtexpress.go
@@ -7,6 +7,7 @@ import (
 
 	"github.com/go-resty/resty/v2"
 
+	"git.selly.red/Selly-Modules/3pl/util/base64"
 	"git.selly.red/Selly-Modules/3pl/util/pjson"
 )
 
@@ -115,5 +116,5 @@ func (c *Client) getDigest(data string) string {
 	h := md5.New()
 
 	io.WriteString(h, s)
-	return fmt.Sprintf("%x", h.Sum(nil))
+	return base64.Encode([]byte(fmt.Sprintf("%x", h.Sum(nil))))
 }