diff --git a/browser/components/CodeEditor.js b/browser/components/CodeEditor.js
index dfe072ef2..7feef2e84 100644
--- a/browser/components/CodeEditor.js
+++ b/browser/components/CodeEditor.js
@@ -4,6 +4,7 @@ import _ from 'lodash'
 import CodeMirror from 'codemirror'
 import 'codemirror-mode-elixir'
 import attachmentManagement from 'browser/main/lib/dataApi/attachmentManagement'
+import convertModeName from 'browser/lib/convertModeName'
 import eventEmitter from 'browser/main/lib/eventEmitter'
 import iconv from 'iconv-lite'
 
@@ -15,21 +16,6 @@ const defaultEditorFontFamily = ['Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', '
 const buildCMRulers = (rulers, enableRulers) =>
   enableRulers ? rulers.map(ruler => ({ column: ruler })) : []
 
-function pass (name) {
-  switch (name) {
-    case 'ejs':
-      return 'Embedded Javascript'
-    case 'html_ruby':
-      return 'Embedded Ruby'
-    case 'objectivec':
-      return 'Objective C'
-    case 'text':
-      return 'Plain Text'
-    default:
-      return name
-  }
-}
-
 export default class CodeEditor extends React.Component {
   constructor (props) {
     super(props)
@@ -229,7 +215,7 @@ export default class CodeEditor extends React.Component {
   }
 
   setMode (mode) {
-    let syntax = CodeMirror.findModeByName(pass(mode))
+    let syntax = CodeMirror.findModeByName(convertModeName(mode))
     if (syntax == null) syntax = CodeMirror.findModeByName('Plain Text')
 
     this.editor.setOption('mode', syntax.mime)
diff --git a/browser/components/MarkdownPreview.js b/browser/components/MarkdownPreview.js
index 058dce192..6646f7494 100755
--- a/browser/components/MarkdownPreview.js
+++ b/browser/components/MarkdownPreview.js
@@ -10,6 +10,7 @@ import flowchart from 'flowchart'
 import SequenceDiagram from 'js-sequence-diagrams'
 import eventEmitter from 'browser/main/lib/eventEmitter'
 import htmlTextHelper from 'browser/lib/htmlTextHelper'
+import convertModeName from 'browser/lib/convertModeName'
 import copy from 'copy-to-clipboard'
 import mdurl from 'mdurl'
 import exportNote from 'browser/main/lib/dataApi/exportNote'
@@ -122,7 +123,6 @@ if (!OSX) {
   defaultFontFamily.unshift('meiryo')
 }
 const defaultCodeBlockFontFamily = ['Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', 'source-code-pro', 'monospace']
-
 export default class MarkdownPreview extends React.Component {
   constructor (props) {
     super(props)
@@ -430,7 +430,7 @@ export default class MarkdownPreview extends React.Component {
       : 'default'
 
     _.forEach(this.refs.root.contentWindow.document.querySelectorAll('.code code'), (el) => {
-      let syntax = CodeMirror.findModeByName(el.className)
+      let syntax = CodeMirror.findModeByName(convertModeName(el.className))
       if (syntax == null) syntax = CodeMirror.findModeByName('Plain Text')
       CodeMirror.requireMode(syntax.mode, () => {
         const content = htmlTextHelper.decodeEntities(el.innerHTML)
diff --git a/browser/lib/convertModeName.js b/browser/lib/convertModeName.js
new file mode 100644
index 000000000..b04310591
--- /dev/null
+++ b/browser/lib/convertModeName.js
@@ -0,0 +1,14 @@
+export default function convertModeName (name) {
+  switch (name) {
+    case 'ejs':
+      return 'Embedded Javascript'
+    case 'html_ruby':
+      return 'Embedded Ruby'
+    case 'objectivec':
+      return 'Objective C'
+    case 'text':
+      return 'Plain Text'
+    default:
+      return name
+  }
+}
diff --git a/browser/main/Detail/SnippetNoteDetail.js b/browser/main/Detail/SnippetNoteDetail.js
index 411027d52..4f9903e91 100644
--- a/browser/main/Detail/SnippetNoteDetail.js
+++ b/browser/main/Detail/SnippetNoteDetail.js
@@ -18,6 +18,7 @@ import context from 'browser/lib/context'
 import ConfigManager from 'browser/main/lib/ConfigManager'
 import _ from 'lodash'
 import {findNoteTitle} from 'browser/lib/findNoteTitle'
+import convertModeName from 'browser/lib/convertModeName'
 import AwsMobileAnalyticsConfig from 'browser/main/lib/AwsMobileAnalyticsConfig'
 import TrashButton from './TrashButton'
 import RestoreButton from './RestoreButton'
@@ -29,21 +30,6 @@ import { formatDate } from 'browser/lib/date-formatter'
 import i18n from 'browser/lib/i18n'
 import { confirmDeleteNote } from 'browser/lib/confirmDeleteNote'
 
-function pass (name) {
-  switch (name) {
-    case 'ejs':
-      return 'Embedded Javascript'
-    case 'html_ruby':
-      return 'Embedded Ruby'
-    case 'objectivec':
-      return 'Objective C'
-    case 'text':
-      return 'Plain Text'
-    default:
-      return name
-  }
-}
-
 const electron = require('electron')
 const { remote } = electron
 const { Menu, MenuItem, dialog } = remote
@@ -677,7 +663,7 @@ class SnippetNoteDetail extends React.Component {
     const viewList = note.snippets.map((snippet, index) => {
       const isActive = this.state.snippetIndex === index
 
-      let syntax = CodeMirror.findModeByName(pass(snippet.mode))
+      let syntax = CodeMirror.findModeByName(convertModeName(snippet.mode))
       if (syntax == null) syntax = CodeMirror.findModeByName('Plain Text')
 
       return <div styleName='tabView'
diff --git a/lib/main.html b/lib/main.html
index 5e5d13c31..15e2bbebc 100644
--- a/lib/main.html
+++ b/lib/main.html
@@ -77,6 +77,7 @@
   <script src="../node_modules/codemirror/addon/mode/overlay.js"></script>
   <script src="../node_modules/codemirror/addon/mode/loadmode.js"></script>
   <script src="../node_modules/codemirror/addon/mode/simple.js"></script>
+  <script src="../node_modules/codemirror/addon/mode/multiplex.js"></script>
   <script src="../node_modules/codemirror/keymap/sublime.js"></script>
   <script src="../node_modules/codemirror/keymap/vim.js"></script>
   <script src="../node_modules/codemirror/keymap/emacs.js"></script>