diff --git a/libs/line-message/index.js b/libs/line-message/index.js
index d911280..61d6730 100644
--- a/libs/line-message/index.js
+++ b/libs/line-message/index.js
@@ -1,12 +1,17 @@
 const commands = require('./commands')
 const api = require('../api-action')
+const DB = require('@libs/database')
 
 /**
  * parse text message object
  * @param {object} evt line message event object
  */
 const textMessage = async (evt) => {
-  let {replyToken, source, message} = evt
+  let {replyToken, source, message, type} = evt
+  if (type === 'leave' && 'groupId' in source && 'type' in source && source.type === 'group') {
+    await leaveGroup(source.groupId)
+    return
+  }
   if (!source || !('type' in source) || source.type !== 'group') return
   if (!message || message.type !== 'text') return
   let {text} = message
@@ -22,6 +27,10 @@ const textMessage = async (evt) => {
   }
 }
 
+const leaveGroup = async (group = '') => {
+
+}
+
 module.exports = {
   textMessage
 }