diff -ura a/gruntfile.js b/gruntfile.js
--- a/gruntfile.js	2018-01-13 11:01:53.000000000 +0100
+++ b/gruntfile.js	2018-01-13 14:05:16.263127255 +0100
@@ -6,6 +6,7 @@
 
 module.exports = function (grunt) {
   var authCode
+  /*
   try {
     authCode = grunt.file.readJSON('secret/auth_code.json')
   } catch (e) {
@@ -13,6 +14,7 @@
       console.warn('secret/auth_code.json is not found. CodeSigning is not available.')
     }
   }
+  */
   const OSX_COMMON_NAME = authCode != null ? authCode.OSX_COMMON_NAME : ''
   const WIN_CERT_PASSWORD = authCode != null ? authCode.WIN_CERT_PASSWORD : ''
 
@@ -74,10 +76,12 @@
 
   grunt.initConfig(initConfig)
   grunt.loadNpmTasks('grunt-electron-installer')
+  /*
   if (!WIN) {
     grunt.loadNpmTasks('grunt-electron-installer-debian')
     grunt.loadNpmTasks('grunt-electron-installer-redhat')
   }
+  */
 
   grunt.registerTask('compile', function () {
     var done = this.async()
diff -ura a/package.json b/package.json
--- a/package.json	2018-01-13 13:57:16.534105000 +0100
+++ b/package.json	2018-01-13 14:04:26.504265975 +0100
@@ -103,7 +103,7 @@
     "css-loader": "0.19.0",
     "devtron": "1.4.0",
     "dom-storage": "2.0.2",
-    "electron-packager": "6.0.2",
+    "electron-packager": "8.6.0",
     "electron": "1.7.10",
     "eslint": "3.19.0",
     "eslint-config-standard": "6.2.1",
@@ -111,7 +111,7 @@
     "eslint-plugin-react": "7.2.0",
     "eslint-plugin-standard": "3.0.1",
     "faker": "3.1.0",
-    "grunt": "0.4.5",
+    "grunt": "1.0.1",
     "grunt-electron-installer": "2.1.0",
     "history": "1.17.0",
     "jsdom": "9.12.0",
@@ -125,15 +125,11 @@
     "react-router-redux": "4.0.8",
     "standard": "8.6.0",
     "style-loader": "0.12.4",
-    "stylus": "0.52.4",
+    "stylus": "0.54.4",
     "stylus-loader": "2.5.1",
     "webpack": "1.15.0",
     "webpack-dev-server": "1.16.5"
   },
-  "optionalDependencies": {
-    "grunt-electron-installer-debian": "0.2.0",
-    "grunt-electron-installer-redhat": "0.3.1"
-  },
   "optional": false,
   "ava": {
     "files": [