diff --git a/lib/models/user.js b/lib/models/user.js
index 648db73..2ebf6d0 100644
--- a/lib/models/user.js
+++ b/lib/models/user.js
@@ -1,7 +1,7 @@
 'use strict'
 // external modules
 var Sequelize = require('sequelize')
-var scrypt = require('@mlink/scrypt')
+var scrypt = require('scrypt')
 
 // core
 var logger = require('../logger')
diff --git a/package.json b/package.json
index a3da0ba..8021501 100644
--- a/package.json
+++ b/package.json
@@ -16,6 +16,7 @@
     "doctoc": "doctoc --title='# Table of Contents' README.md"
   },
   "dependencies": {
+    "@hackmd/js-sequence-diagrams": "^0.0.1-alpha.2",
     "@passport-next/passport-openid": "^1.0.0",
     "Idle.Js": "git+https://github.com/shawnmclean/Idle.js",
     "archiver": "^2.1.1",
@@ -56,7 +57,6 @@
     "jquery-mousewheel": "^3.1.13",
     "jquery-ui": "^1.12.1",
     "js-cookie": "^2.1.3",
-    "js-sequence-diagrams": "^1000000.0.6",
     "js-url": "^2.3.0",
     "js-yaml": "^3.7.0",
     "jsdom-nogyp": "^0.8.3",
@@ -109,7 +109,7 @@
     "readline-sync": "^1.4.7",
     "request": "^2.88.0",
     "reveal.js": "~3.7.0",
-    "@mlink/scrypt": "^6.1.2",
+    "scrypt": "^6.0.3",
     "select2": "^3.5.2-browserify",
     "sequelize": "^3.28.0",
     "sequelize-cli": "^2.5.1",
diff --git a/webpack.common.js b/webpack.common.js
index 1e9c070..9e1432b 100644
--- a/webpack.common.js
+++ b/webpack.common.js
@@ -211,7 +211,7 @@ module.exports = {
       'script-loader!codemirrorInlineAttachment',
       'script-loader!ot',
       'flowchart.js',
-      'js-sequence-diagrams',
+      'script-loader!js-sequence-diagrams',
       'expose-loader?RevealMarkdown!reveal-markdown',
       path.join(__dirname, 'public/js/index.js')
     ],
@@ -262,7 +262,7 @@ module.exports = {
       'script-loader!codemirrorInlineAttachment',
       'script-loader!ot',
       'flowchart.js',
-      'js-sequence-diagrams',
+      'script-loader!js-sequence-diagrams',
       'expose-loader?Viz!viz.js',
       'script-loader!abcjs',
       'expose-loader?io!socket.io-client',
@@ -272,7 +272,7 @@ module.exports = {
     pretty: [
       'babel-polyfill',
       'flowchart.js',
-      'js-sequence-diagrams',
+      'script-loader!js-sequence-diagrams',
       'expose-loader?RevealMarkdown!reveal-markdown',
       path.join(__dirname, 'public/js/pretty.js')
     ],
@@ -297,7 +297,7 @@ module.exports = {
       'expose-loader?emojify!emojify.js',
       'script-loader!gist-embed',
       'flowchart.js',
-      'js-sequence-diagrams',
+      'script-loader!js-sequence-diagrams',
       'expose-loader?Viz!viz.js',
       'script-loader!abcjs',
       'expose-loader?RevealMarkdown!reveal-markdown',
@@ -307,7 +307,7 @@ module.exports = {
       'babel-polyfill',
       'bootstrap-tooltip',
       'flowchart.js',
-      'js-sequence-diagrams',
+      'script-loader!js-sequence-diagrams',
       'expose-loader?RevealMarkdown!reveal-markdown',
       path.join(__dirname, 'public/js/slide.js')
     ],
@@ -335,7 +335,7 @@ module.exports = {
       'expose-loader?emojify!emojify.js',
       'script-loader!gist-embed',
       'flowchart.js',
-      'js-sequence-diagrams',
+      'script-loader!js-sequence-diagrams',
       'expose-loader?Viz!viz.js',
       'script-loader!abcjs',
       'headjs',
@@ -369,7 +369,8 @@ module.exports = {
       'headjs': path.join(__dirname, 'node_modules/reveal.js/lib/js/head.min.js'),
       'reveal-markdown': path.join(__dirname, 'public/js/reveal-markdown.js'),
       abcjs: path.join(__dirname, 'public/vendor/abcjs_basic_3.1.1-min.js'),
-      raphael: path.join(__dirname, 'node_modules/raphael/raphael.no-deps.js')
+      raphael: path.join(__dirname, 'node_modules/raphael/raphael.min.js'),
+      'js-sequence-diagrams': path.join(__dirname, 'node_modules/@hackmd/js-sequence-diagrams/build/main.js')
     }
   },
 
@@ -418,12 +419,6 @@ module.exports = {
         },
         'less-loader'
       ]
-    }, {
-      test: require.resolve('js-sequence-diagrams'),
-      use: [{
-        loader: 'imports-loader',
-        options: { _: 'lodash', Raphael: 'raphael', eve: 'eve' }
-      }]
     }, {
       test: /\.eot(\?v=\d+\.\d+\.\d+)?$/,
       use: [{ loader: 'file-loader' }]
diff --git a/yarn.lock b/yarn.lock
index 3d71960..6044542 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -18,13 +18,10 @@
     esutils "^2.0.2"
     js-tokens "^4.0.0"
 
-"@mlink/scrypt@^6.1.2":
-  version "6.1.2"
-  resolved "https://registry.yarnpkg.com/@mlink/scrypt/-/scrypt-6.1.2.tgz#74fa1d91f27d5e916d88773fda59a422ddab7cf4"
-  integrity sha512-7w1QoOih2eW0d0Lj5SK9mFV/8OhtZqYnT0IQiY/iCEcjdGAAt145YAAiq21iVV+H0Xe62fnF6VbZPMO3+qrSAQ==
-  dependencies:
-    bindings "^1.3.0"
-    nan "^2.10.0"
+"@hackmd/js-sequence-diagrams@^0.0.1-alpha.2":
+  version "0.0.1-alpha.2"
+  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==
 
 "@passport-next/passport-openid@^1.0.0":
   version "1.0.0"
@@ -1428,13 +1425,6 @@ binary-extensions@^1.0.0:
   resolved "https://registry.yarnpkg.com/binary-extensions/-/binary-extensions-1.13.0.tgz#9523e001306a32444b907423f1de2164222f6ab1"
   integrity sha512-EgmjVLMn22z7eGGv3kcnHwSnJXmFHjISTY9E/S5lIcTD3Oxw05QTcBLNkJFzcb3cNueUdF/IN4U+d78V0zO8Hw==
 
-bindings@^1.3.0:
-  version "1.5.0"
-  resolved "https://registry.yarnpkg.com/bindings/-/bindings-1.5.0.tgz#10353c9e945334bc0511a6d90b38fbc7c9c504df"
-  integrity sha512-p2q/t/mhvuOj/UeLlV6566GD/guowlr0hHxClI0W9m7MWYkL1F0hLo+0Aexs9HSPCtR1SXQ0TD3MMKrXZajbiQ==
-  dependencies:
-    file-uri-to-path "1.0.0"
-
 bl@^1.0.0:
   version "1.2.2"
   resolved "https://registry.yarnpkg.com/bl/-/bl-1.2.2.tgz#a160911717103c07410cef63ef51b397c025af9c"
@@ -3653,10 +3643,6 @@ eve-raphael@0.5.0:
   resolved "https://registry.yarnpkg.com/eve-raphael/-/eve-raphael-0.5.0.tgz#17c754b792beef3fa6684d79cf5a47c63c4cda30"
   integrity sha1-F8dUt5K+7z+maE15z1pHxjxM2jA=
 
-"eve@git://github.com/adobe-webplatform/eve.git#eef80ed":
-  version "0.4.1"
-  resolved "git://github.com/adobe-webplatform/eve.git#eef80ed8d188423c2272746fb8ae5cc8dad84cb1"
-
 event-emitter@^0.3.5:
   version "0.3.5"
   resolved "https://registry.yarnpkg.com/event-emitter/-/event-emitter-0.3.5.tgz#df8c69eef1647923c7157b9ce83840610b02cc39"
@@ -4022,11 +4008,6 @@ file-saver@^1.3.3:
   resolved "https://registry.yarnpkg.com/file-saver/-/file-saver-1.3.8.tgz#e68a30c7cb044e2fb362b428469feb291c2e09d8"
   integrity sha512-spKHSBQIxxS81N/O21WmuXA2F6wppUCsutpzenOeZzOCCJ5gEfcbqJP983IrpLXzYmXnMUa6J03SubcNPdKrlg==
 
-file-uri-to-path@1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/file-uri-to-path/-/file-uri-to-path-1.0.0.tgz#553a7b8446ff6f684359c445f1e37a05dacc33dd"
-  integrity sha512-0Zt+s3L7Vf1biwWZ29aARiVYLx7iMGnEUl9x33fbB/j3jR81u/O2LbqK+Bm1CDSNDKVtJ/YjwY7TUd5SkeLQLw==
-
 filename-regex@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/filename-regex/-/filename-regex-2.0.1.tgz#c1c4b9bee3e09725ddb106b75c1e301fe2f18b26"
@@ -5718,14 +5699,6 @@ js-cookie@^2.1.3:
   resolved "https://registry.yarnpkg.com/js-cookie/-/js-cookie-2.2.0.tgz#1b2c279a6eece380a12168b92485265b35b1effb"
   integrity sha1-Gywnmm7s44ChIWi5JIUmWzWx7/s=
 
-js-sequence-diagrams@^1000000.0.6:
-  version "1000000.0.6"
-  resolved "https://registry.yarnpkg.com/js-sequence-diagrams/-/js-sequence-diagrams-1000000.0.6.tgz#e95db01420479c5ccbc12046af1da42fde649e5c"
-  integrity sha1-6V2wFCBHnFzLwSBGrx2kL95knlw=
-  dependencies:
-    raphael "~2.1.x"
-    underscore "~1.4.x"
-
 js-string-escape@1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/js-string-escape/-/js-string-escape-1.0.1.tgz#e2625badbc0d67c7533e9edc1068c587ae4137ef"
@@ -7032,6 +7005,11 @@ mysql@^2.12.0:
     safe-buffer "5.1.2"
     sqlstring "2.3.1"
 
+nan@^2.0.8:
+  version "2.13.2"
+  resolved "https://registry.yarnpkg.com/nan/-/nan-2.13.2.tgz#f51dc7ae66ba7d5d55e1e6d4d8092e802c9aefe7"
+  integrity sha512-TghvYc72wlMGMVMluVo9WRJc0mB8KxxF/gZ4YYFy7V2ZQX9l7rgbPg7vjS9mt6U5HXODVFVI2bOduCzwOMv/lw==
+
 nan@^2.10.0, nan@^2.9.2:
   version "2.13.1"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.13.1.tgz#a15bee3790bde247e8f38f1d446edcdaeb05f2dd"
@@ -8707,13 +8685,6 @@ raphael@2.2.7:
   dependencies:
     eve-raphael "0.5.0"
 
-raphael@~2.1.x:
-  version "2.1.4"
-  resolved "https://registry.yarnpkg.com/raphael/-/raphael-2.1.4.tgz#b09ca664ad048b814bb2ff5d4d1e75838cab9c97"
-  integrity sha1-sJymZK0Ei4FLsv9dTR51g4yrnJc=
-  dependencies:
-    eve "git://github.com/adobe-webplatform/eve.git#eef80ed"
-
 raw-body@2.3.3:
   version "2.3.3"
   resolved "https://registry.yarnpkg.com/raw-body/-/raw-body-2.3.3.tgz#1b324ece6b5706e153855bc1148c65bb7f6ea0c3"
@@ -9361,6 +9332,13 @@ script-loader@^0.7.2:
   dependencies:
     raw-loader "~0.5.1"
 
+scrypt@^6.0.3:
+  version "6.0.3"
+  resolved "https://registry.yarnpkg.com/scrypt/-/scrypt-6.0.3.tgz#04e014a5682b53fa50c2d5cce167d719c06d870d"
+  integrity sha1-BOAUpWgrU/pQwtXM4WfXGcBthw0=
+  dependencies:
+    nan "^2.0.8"
+
 select2@^3.5.2-browserify:
   version "3.5.2-browserify"
   resolved "https://registry.yarnpkg.com/select2/-/select2-3.5.2-browserify.tgz#dc4dafda38d67a734e8a97a46f0d3529ae05391d"
@@ -10561,11 +10539,6 @@ underscore@^1.7.0:
   resolved "https://registry.yarnpkg.com/underscore/-/underscore-1.9.1.tgz#06dce34a0e68a7babc29b365b8e74b8925203961"
   integrity sha512-5/4etnCkd9c8gwgowi5/om/mYO5ajCaOgdzj/oW+0eQV9WxKBDZw5+ycmKmeaTXjInS/W0BzpGLo2xR2aBwZdg==
 
-underscore@~1.4.x:
-  version "1.4.4"
-  resolved "https://registry.yarnpkg.com/underscore/-/underscore-1.4.4.tgz#61a6a32010622afa07963bf325203cf12239d604"
-  integrity sha1-YaajIBBiKvoHljvzJSA88SI51gQ=
-
 underscore@~1.6.0:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/underscore/-/underscore-1.6.0.tgz#8b38b10cacdef63337b8b24e4ff86d45aea529a8"