diff --git a/lib/history.js b/lib/history.js
index 9c389bfa..b3ec7cbb 100644
--- a/lib/history.js
+++ b/lib/history.js
@@ -1,7 +1,7 @@
 'use strict'
 // history
 // external modules
-var LZString = require('lz-string')
+var LZString = require('@hackmd/lz-string')
 
 // core
 var config = require('./config')
diff --git a/lib/models/note.js b/lib/models/note.js
index 70ee6c52..11fee575 100644
--- a/lib/models/note.js
+++ b/lib/models/note.js
@@ -2,7 +2,7 @@
 // external modules
 var fs = require('fs')
 var path = require('path')
-var LZString = require('lz-string')
+var LZString = require('@hackmd/lz-string')
 var base64url = require('base64url')
 var md = require('markdown-it')()
 var metaMarked = require('meta-marked')
diff --git a/package.json b/package.json
index 7d36f60d..11670195 100644
--- a/package.json
+++ b/package.json
@@ -21,6 +21,7 @@
     "@hackmd/idle-js": "^1.0.1",
     "@hackmd/imgur": "^0.4.1",
     "@hackmd/js-sequence-diagrams": "^0.0.1-alpha.2",
+    "@hackmd/lz-string": "1.4.4",
     "@passport-next/passport-openid": "^1.0.0",
     "archiver": "^2.1.1",
     "async": "^2.1.4",
@@ -62,7 +63,6 @@
     "keymaster": "^1.6.2",
     "list.js": "^1.5.0",
     "lodash": "^4.17.11",
-    "lz-string": "git+https://github.com/hackmdio/lz-string.git",
     "markdown-it": "^8.2.2",
     "markdown-it-abbr": "^1.0.4",
     "markdown-it-container": "^2.0.0",
@@ -189,8 +189,8 @@
     "mocha": "^5.2.0",
     "mock-require": "^3.0.3",
     "optimize-css-assets-webpack-plugin": "^5.0.0",
-    "sequelize-cli": "^5.4.0",
     "script-loader": "^0.7.2",
+    "sequelize-cli": "^5.4.0",
     "string-loader": "^0.0.1",
     "style-loader": "^0.21.0",
     "uglifyjs-webpack-plugin": "^1.2.7",
diff --git a/public/js/history.js b/public/js/history.js
index b085a19a..cd2c18be 100644
--- a/public/js/history.js
+++ b/public/js/history.js
@@ -2,7 +2,7 @@
 /* global serverurl, moment */
 
 import store from 'store'
-import LZString from 'lz-string'
+import LZString from '@hackmd/lz-string'
 
 import escapeHTML from 'lodash/escape'
 
diff --git a/webpack.common.js b/webpack.common.js
index f5f54da0..cb2eadf5 100644
--- a/webpack.common.js
+++ b/webpack.common.js
@@ -200,7 +200,6 @@ module.exports = {
     index: [
       'babel-polyfill',
       'script-loader!jquery-ui-resizable',
-      'expose-loader?LZString!lz-string',
       'script-loader!codemirror',
       'script-loader!inlineAttachment',
       'script-loader!jqueryTextcomplete',
@@ -249,7 +248,6 @@ module.exports = {
       'expose-loader?hljs!highlight.js',
       'expose-loader?emojify!emojify.js',
       'script-loader!gist-embed',
-      'expose-loader?LZString!lz-string',
       'script-loader!codemirror',
       'script-loader!inlineAttachment',
       'script-loader!jqueryTextcomplete',
diff --git a/yarn.lock b/yarn.lock
index 94955170..34363fd0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -46,6 +46,11 @@
   resolved "https://registry.yarnpkg.com/@hackmd/js-sequence-diagrams/-/js-sequence-diagrams-0.0.1-alpha.2.tgz#dec87c02b0483a18be6725c4bb7a53df1c701e36"
   integrity sha512-UCkaIuvpi5mDyxGXPaJIM8LJLR9X8yAZk0c58Byjx/bVPvMcFOT+Kyft7LjAbO5ct6MFAVNrhs/6jqY2RfRhLA==
 
+"@hackmd/lz-string@1.4.4":
+  version "1.4.4"
+  resolved "https://registry.yarnpkg.com/@hackmd/lz-string/-/lz-string-1.4.4.tgz#3f2a9e93c209cb43dc4097e2a8eea3fd87ff45f9"
+  integrity sha512-KP8U3BGp/qOdoQBfQp1nHvdyT/xi3dBV2qq8YPv1P5rBCR7OF9NpGTdAoOR6n3fONEaMJBdy069cGGbycJolpQ==
+
 "@passport-next/passport-openid@^1.0.0":
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/@passport-next/passport-openid/-/passport-openid-1.0.0.tgz#d3b5e067a9aa1388ed172ab7cc02c39b8634283d"