diff --git a/lib/models/note.js b/lib/models/note.js
index 84da785..4c501d2 100644
--- a/lib/models/note.js
+++ b/lib/models/note.js
@@ -9,6 +9,7 @@ var cheerio = require('cheerio');
 var shortId = require('shortid');
 var Sequelize = require("sequelize");
 var async = require('async');
+var moment = require('moment');
 
 // core
 var config = require("../config.js");
@@ -91,7 +92,28 @@ module.exports = function (sequelize, DataTypes) {
                             }
                         }).then(function (note) {
                             if (note) {
-                                return callback(null, note.id);
+                                var filePath = path.join(config.docspath, noteId + '.md');
+                                if (Note.checkFileExist(filePath)) {
+                                    // if doc in filesystem have newer modified time than last change time
+                                    // then will update the doc in db
+                                    var fsModifiedTime = moment(fs.statSync(filePath).mtime);
+                                    var dbModifiedTime = moment(note.lastchangeAt || note.createdAt);
+                                    if (fsModifiedTime.isAfter(dbModifiedTime)) {
+                                        var body = fs.readFileSync(filePath, 'utf8');
+                                        note.title = LZString.compressToBase64(Note.parseNoteTitle(body));
+                                        note.content = LZString.compressToBase64(body);
+                                        note.lastchangeAt = fsModifiedTime;
+                                        note.save().then(function (note) {
+                                            return callback(null, note.id);
+                                        }).catch(function (err) {
+                                            return _callback(err, null);
+                                        });
+                                    } else {
+                                        return callback(null, note.id);
+                                    }
+                                } else {
+                                    return callback(null, note.id);
+                                }
                             } else {
                                 var filePath = path.join(config.docspath, noteId + '.md');
                                 if (Note.checkFileExist(filePath)) {