diff --git a/web/react/components/create_comment.jsx b/web/react/components/create_comment.jsx
index 18936e8086..0585941653 100644
--- a/web/react/components/create_comment.jsx
+++ b/web/react/components/create_comment.jsx
@@ -8,6 +8,7 @@ const SocketStore = require('../stores/socket_store.jsx');
 const ChannelStore = require('../stores/channel_store.jsx');
 const UserStore = require('../stores/user_store.jsx');
 const PostStore = require('../stores/post_store.jsx');
+const PreferenceStore = require('../stores/preference_store.jsx');
 const Textbox = require('./textbox.jsx');
 const MsgTyping = require('./msg_typing.jsx');
 const FileUpload = require('./file_upload.jsx');
@@ -27,7 +28,7 @@ export default class CreateComment extends React.Component {
         this.handleSubmit = this.handleSubmit.bind(this);
         this.commentMsgKeyPress = this.commentMsgKeyPress.bind(this);
         this.handleUserInput = this.handleUserInput.bind(this);
-        this.handleArrowUp = this.handleArrowUp.bind(this);
+        this.handleKeyDown = this.handleKeyDown.bind(this);
         this.handleUploadStart = this.handleUploadStart.bind(this);
         this.handleFileUploadComplete = this.handleFileUploadComplete.bind(this);
         this.handleUploadError = this.handleUploadError.bind(this);
@@ -36,6 +37,7 @@ export default class CreateComment extends React.Component {
         this.handleSubmit = this.handleSubmit.bind(this);
         this.getFileCount = this.getFileCount.bind(this);
         this.handleResize = this.handleResize.bind(this);
+        this.onPreferenceChange = this.onPreferenceChange.bind(this);
 
         PostStore.clearCommentDraftUploads();
 
@@ -45,15 +47,23 @@ export default class CreateComment extends React.Component {
             uploadsInProgress: draft.uploadsInProgress,
             previews: draft.previews,
             submitting: false,
-            windowWidth: Utils.windowWidth()
+            windowWidth: Utils.windowWidth(),
+            ctrlSend: PreferenceStore.getPreference(Constants.Preferences.CATEGORY_ADVANCED_SETTINGS, 'send_on_ctrl_enter', {value: 'false'}).value
         };
     }
     componentDidMount() {
+        PreferenceStore.addChangeListener(this.onPreferenceChange);
         window.addEventListener('resize', this.handleResize);
     }
     componentWillUnmount() {
+        PreferenceStore.removeChangeListener(this.onPreferenceChange);
         window.removeEventListener('resize', this.handleResize);
     }
+    onPreferenceChange() {
+        this.setState({
+            ctrlSend: PreferenceStore.getPreference(Constants.Preferences.CATEGORY_ADVANCED_SETTINGS, 'send_on_ctrl_enter', {value: 'false'}).value
+        });
+    }
     handleResize() {
         this.setState({windowWidth: Utils.windowWidth()});
     }
@@ -140,10 +150,12 @@ export default class CreateComment extends React.Component {
         this.setState({messageText: '', submitting: false, postError: null, previews: [], serverError: null});
     }
     commentMsgKeyPress(e) {
-        if (e.which === 13 && !e.shiftKey && !e.altKey) {
-            e.preventDefault();
-            ReactDOM.findDOMNode(this.refs.textbox).blur();
-            this.handleSubmit(e);
+        if (this.state.ctrlSend === 'true' && e.ctrlKey || this.state.ctrlSend === 'false') {
+            if (e.which === KeyCodes.ENTER && !e.shiftKey && !e.altKey) {
+                e.preventDefault();
+                ReactDOM.findDOMNode(this.refs.textbox).blur();
+                this.handleSubmit(e);
+            }
         }
 
         const t = Date.now();
@@ -161,7 +173,12 @@ export default class CreateComment extends React.Component {
         $('.post-right__scroll').perfectScrollbar('update');
         this.setState({messageText: messageText});
     }
-    handleArrowUp(e) {
+    handleKeyDown(e) {
+        if (this.state.ctrlSend === 'true' && e.keyCode === KeyCodes.ENTER && e.ctrlKey === true) {
+            this.commentMsgKeyPress(e);
+            return;
+        }
+
         if (e.keyCode === KeyCodes.UP && this.state.messageText === '') {
             e.preventDefault();
 
@@ -313,7 +330,7 @@ export default class CreateComment extends React.Component {
                             <Textbox
                                 onUserInput={this.handleUserInput}
                                 onKeyPress={this.commentMsgKeyPress}
-                                onKeyDown={this.handleArrowUp}
+                                onKeyDown={this.handleKeyDown}
                                 messageText={this.state.messageText}
                                 createMessage='Add a comment...'
                                 initialText=''
diff --git a/web/react/components/create_post.jsx b/web/react/components/create_post.jsx
index 32ee31efe5..cdbc3bc6d8 100644
--- a/web/react/components/create_post.jsx
+++ b/web/react/components/create_post.jsx
@@ -8,6 +8,7 @@ const ChannelStore = require('../stores/channel_store.jsx');
 const PostStore = require('../stores/post_store.jsx');
 const UserStore = require('../stores/user_store.jsx');
 const SocketStore = require('../stores/socket_store.jsx');
+const PreferenceStore = require('../stores/preference_store.jsx');
 const MsgTyping = require('./msg_typing.jsx');
 const Textbox = require('./textbox.jsx');
 const FileUpload = require('./file_upload.jsx');
@@ -36,9 +37,10 @@ export default class CreatePost extends React.Component {
         this.removePreview = this.removePreview.bind(this);
         this.onChange = this.onChange.bind(this);
         this.getFileCount = this.getFileCount.bind(this);
-        this.handleArrowUp = this.handleArrowUp.bind(this);
+        this.handleKeyDown = this.handleKeyDown.bind(this);
         this.handleResize = this.handleResize.bind(this);
         this.sendMessage = this.sendMessage.bind(this);
+        this.onPreferenceChange = this.onPreferenceChange.bind(this);
 
         PostStore.clearDraftUploads();
 
@@ -52,8 +54,16 @@ export default class CreatePost extends React.Component {
             submitting: false,
             initialText: draft.messageText,
             windowWidth: Utils.windowWidth(),
-            windowHeight: Utils.windowHeight()
+            windowHeight: Utils.windowHeight(),
+            ctrlSend: PreferenceStore.getPreference(Constants.Preferences.CATEGORY_ADVANCED_SETTINGS, 'send_on_ctrl_enter', {value: 'false'}).value
         };
+
+        PreferenceStore.addChangeListener(this.onPreferenceChange);
+    }
+    onPreferenceChange() {
+        this.setState({
+            ctrlSend: PreferenceStore.getPreference(Constants.Preferences.CATEGORY_ADVANCED_SETTINGS, 'send_on_ctrl_enter', {value: 'false'}).value
+        });
     }
     handleResize() {
         this.setState({
@@ -201,10 +211,12 @@ export default class CreatePost extends React.Component {
         );
     }
     postMsgKeyPress(e) {
-        if (e.which === KeyCodes.ENTER && !e.shiftKey && !e.altKey) {
-            e.preventDefault();
-            ReactDOM.findDOMNode(this.refs.textbox).blur();
-            this.handleSubmit(e);
+        if (this.state.ctrlSend === 'true' && e.ctrlKey || this.state.ctrlSend === 'false') {
+            if (e.which === KeyCodes.ENTER && !e.shiftKey && !e.altKey) {
+                e.preventDefault();
+                ReactDOM.findDOMNode(this.refs.textbox).blur();
+                this.handleSubmit(e);
+            }
         }
 
         const t = Date.now();
@@ -328,7 +340,12 @@ export default class CreatePost extends React.Component {
         const draft = PostStore.getDraft(channelId);
         return draft.previews.length + draft.uploadsInProgress.length;
     }
-    handleArrowUp(e) {
+    handleKeyDown(e) {
+        if (this.state.ctrlSend === 'true' && e.keyCode === KeyCodes.ENTER && e.ctrlKey === true) {
+            this.postMsgKeyPress(e);
+            return;
+        }
+
         if (e.keyCode === KeyCodes.UP && this.state.messageText === '') {
             e.preventDefault();
 
@@ -393,7 +410,7 @@ export default class CreatePost extends React.Component {
                             <Textbox
                                 onUserInput={this.handleUserInput}
                                 onKeyPress={this.postMsgKeyPress}
-                                onKeyDown={this.handleArrowUp}
+                                onKeyDown={this.handleKeyDown}
                                 onHeightChange={this.resizePostHolder}
                                 messageText={this.state.messageText}
                                 createMessage='Write a message...'
diff --git a/web/react/components/user_settings/code_theme_chooser.jsx b/web/react/components/user_settings/code_theme_chooser.jsx
deleted file mode 100644
index eef4b24bae..0000000000
--- a/web/react/components/user_settings/code_theme_chooser.jsx
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
-// See License.txt for license information.
-
-var Constants = require('../../utils/constants.jsx');
-
-export default class CodeThemeChooser extends React.Component {
-    constructor(props) {
-        super(props);
-        this.state = {};
-    }
-    render() {
-        const theme = this.props.theme;
-
-        const premadeThemes = [];
-        for (const k in Constants.CODE_THEMES) {
-            if (Constants.CODE_THEMES.hasOwnProperty(k)) {
-                let activeClass = '';
-                if (k === theme.codeTheme) {
-                    activeClass = 'active';
-                }
-
-                premadeThemes.push(
-                    <div
-                        className='col-xs-6 col-sm-3 premade-themes'
-                        key={'premade-theme-key' + k}
-                    >
-                        <div
-                            className={activeClass}
-                            onClick={() => this.props.updateTheme(k)}
-                        >
-                            <label>
-                                <img
-                                    className='img-responsive'
-                                    src={'/static/images/themes/code_themes/' + k + '.png'}
-                                />
-                                <div className='theme-label'>{Constants.CODE_THEMES[k]}</div>
-                            </label>
-                        </div>
-                    </div>
-                );
-            }
-        }
-
-        return (
-            <div className='row'>
-                {premadeThemes}
-            </div>
-        );
-    }
-}
-
-CodeThemeChooser.propTypes = {
-    theme: React.PropTypes.object.isRequired,
-    updateTheme: React.PropTypes.func.isRequired
-};
diff --git a/web/react/components/user_settings/user_settings.jsx b/web/react/components/user_settings/user_settings.jsx
index 15bf961d64..546e26ca30 100644
--- a/web/react/components/user_settings/user_settings.jsx
+++ b/web/react/components/user_settings/user_settings.jsx
@@ -10,6 +10,7 @@ var AppearanceTab = require('./user_settings_appearance.jsx');
 var DeveloperTab = require('./user_settings_developer.jsx');
 var IntegrationsTab = require('./user_settings_integrations.jsx');
 var DisplayTab = require('./user_settings_display.jsx');
+var AdvancedTab = require('./user_settings_advanced.jsx');
 
 export default class UserSettings extends React.Component {
     constructor(props) {
@@ -110,6 +111,17 @@ export default class UserSettings extends React.Component {
                     />
                 </div>
             );
+        } else if (this.props.activeTab === 'advanced') {
+            return (
+                <div>
+                    <AdvancedTab
+                        user={this.state.user}
+                        activeSection={this.props.activeSection}
+                        updateSection={this.props.updateSection}
+                        updateTab={this.props.updateTab}
+                    />
+                </div>
+            );
         }
 
         return <div/>;
diff --git a/web/react/components/user_settings/user_settings_advanced.jsx b/web/react/components/user_settings/user_settings_advanced.jsx
new file mode 100644
index 0000000000..910444735f
--- /dev/null
+++ b/web/react/components/user_settings/user_settings_advanced.jsx
@@ -0,0 +1,169 @@
+// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+const Client = require('../../utils/client.jsx');
+const SettingItemMin = require('../setting_item_min.jsx');
+const SettingItemMax = require('../setting_item_max.jsx');
+const Constants = require('../../utils/constants.jsx');
+const PreferenceStore = require('../../stores/preference_store.jsx');
+
+export default class AdvancedSettingsDisplay extends React.Component {
+    constructor(props) {
+        super(props);
+
+        this.updateSection = this.updateSection.bind(this);
+        this.updateSetting = this.updateSetting.bind(this);
+        this.handleClose = this.handleClose.bind(this);
+        this.setupInitialState = this.setupInitialState.bind(this);
+
+        this.state = this.setupInitialState();
+    }
+
+    setupInitialState() {
+        const sendOnCtrlEnter = PreferenceStore.getPreference(
+            Constants.Preferences.CATEGORY_ADVANCED_SETTINGS,
+            'send_on_ctrl_enter',
+            {value: 'false'}
+        ).value;
+
+        return {
+            settings: {send_on_ctrl_enter: sendOnCtrlEnter}
+        };
+    }
+
+    updateSetting(setting, value) {
+        const settings = this.state.settings;
+        settings[setting] = value;
+        this.setState(settings);
+    }
+
+    handleSubmit(setting) {
+        const preference = PreferenceStore.setPreference(
+            Constants.Preferences.CATEGORY_ADVANCED_SETTINGS,
+            setting,
+            this.state.settings[setting]
+        );
+
+        Client.savePreferences([preference],
+            () => {
+                PreferenceStore.emitChange();
+                this.updateSection('');
+            },
+            (err) => {
+                this.setState({serverError: err.message});
+            }
+        );
+    }
+
+    updateSection(section) {
+        this.props.updateSection(section);
+    }
+
+    handleClose() {
+        this.updateSection('');
+    }
+
+    componentDidMount() {
+        $('#user_settings').on('hidden.bs.modal', this.handleClose);
+    }
+
+    componentWillUnmount() {
+        $('#user_settings').off('hidden.bs.modal', this.handleClose);
+    }
+
+    render() {
+        const serverError = this.state.serverError || null;
+        let ctrlSendSection;
+
+        if (this.props.activeSection === 'advancedCtrlSend') {
+            const ctrlSendActive = [
+                this.state.settings.send_on_ctrl_enter === 'true',
+                this.state.settings.send_on_ctrl_enter === 'false'
+            ];
+
+            const inputs = [
+                <div key='ctrlSendSetting'>
+                    <div className='radio'>
+                        <label>
+                            <input
+                                type='radio'
+                                checked={ctrlSendActive[0]}
+                                onChange={this.updateSetting.bind(this, 'send_on_ctrl_enter', 'true')}
+                            />
+                            {'On'}
+                        </label>
+                        <br/>
+                    </div>
+                    <div className='radio'>
+                        <label>
+                            <input
+                                type='radio'
+                                checked={ctrlSendActive[1]}
+                                onChange={this.updateSetting.bind(this, 'send_on_ctrl_enter', 'false')}
+                            />
+                            {'Off'}
+                        </label>
+                        <br/>
+                    </div>
+                    <div><br/>{'If enabled \'Enter\' inserts a new line and \'Ctrl + Enter\' submits the message.'}</div>
+                </div>
+            ];
+
+            ctrlSendSection = (
+                <SettingItemMax
+                    title='Send messages on Ctrl + Enter'
+                    inputs={inputs}
+                    submit={() => this.handleSubmit('send_on_ctrl_enter')}
+                    server_error={serverError}
+                    updateSection={(e) => {
+                        this.updateSection('');
+                        e.preventDefault();
+                    }}
+                />
+            );
+        } else {
+            ctrlSendSection = (
+                <SettingItemMin
+                    title='Send messages on Ctrl + Enter'
+                    describe={this.state.settings.send_on_ctrl_enter === 'true' ? 'On' : 'Off'}
+                    updateSection={() => this.props.updateSection('advancedCtrlSend')}
+                />
+            );
+        }
+
+        return (
+            <div>
+                <div className='modal-header'>
+                    <button
+                        type='button'
+                        className='close'
+                        data-dismiss='modal'
+                        aria-label='Close'
+                    >
+                        <span aria-hidden='true'>{'×'}</span>
+                    </button>
+                    <h4
+                        className='modal-title'
+                        ref='title'
+                    >
+                        <i className='modal-back'></i>
+                        {'Advanced Settings'}
+                    </h4>
+                </div>
+                <div className='user-settings'>
+                    <h3 className='tab-header'>{'Advanced Settings'}</h3>
+                    <div className='divider-dark first'/>
+                    {ctrlSendSection}
+                    <div className='divider-dark'/>
+                </div>
+            </div>
+        );
+    }
+}
+
+AdvancedSettingsDisplay.propTypes = {
+    user: React.PropTypes.object,
+    updateSection: React.PropTypes.func,
+    updateTab: React.PropTypes.func,
+    activeSection: React.PropTypes.string
+};
diff --git a/web/react/components/user_settings/user_settings_appearance.jsx b/web/react/components/user_settings/user_settings_appearance.jsx
index e94894a1d9..8c62a189dd 100644
--- a/web/react/components/user_settings/user_settings_appearance.jsx
+++ b/web/react/components/user_settings/user_settings_appearance.jsx
@@ -7,7 +7,6 @@ var Utils = require('../../utils/utils.jsx');
 
 const CustomThemeChooser = require('./custom_theme_chooser.jsx');
 const PremadeThemeChooser = require('./premade_theme_chooser.jsx');
-const CodeThemeChooser = require('./code_theme_chooser.jsx');
 const AppDispatcher = require('../../dispatcher/app_dispatcher.jsx');
 const Constants = require('../../utils/constants.jsx');
 const ActionTypes = Constants.ActionTypes;
@@ -19,14 +18,12 @@ export default class UserSettingsAppearance extends React.Component {
         this.onChange = this.onChange.bind(this);
         this.submitTheme = this.submitTheme.bind(this);
         this.updateTheme = this.updateTheme.bind(this);
-        this.updateCodeTheme = this.updateCodeTheme.bind(this);
         this.handleClose = this.handleClose.bind(this);
         this.handleImportModal = this.handleImportModal.bind(this);
 
         this.state = this.getStateFromStores();
 
         this.originalTheme = this.state.theme;
-        this.originalCodeTheme = this.state.theme.codeTheme;
     }
     componentDidMount() {
         UserStore.addChangeListener(this.onChange);
@@ -61,10 +58,6 @@ export default class UserSettingsAppearance extends React.Component {
             type = 'custom';
         }
 
-        if (!theme.codeTheme) {
-            theme.codeTheme = Constants.DEFAULT_CODE_THEME;
-        }
-
         return {theme, type};
     }
     onChange() {
@@ -100,13 +93,6 @@ export default class UserSettingsAppearance extends React.Component {
         );
     }
     updateTheme(theme) {
-        theme.codeTheme = this.state.theme.codeTheme;
-        this.setState({theme});
-        Utils.applyTheme(theme);
-    }
-    updateCodeTheme(codeTheme) {
-        var theme = this.state.theme;
-        theme.codeTheme = codeTheme;
         this.setState({theme});
         Utils.applyTheme(theme);
     }
@@ -116,7 +102,6 @@ export default class UserSettingsAppearance extends React.Component {
     handleClose() {
         const state = this.getStateFromStores();
         state.serverError = null;
-        state.theme.codeTheme = this.originalCodeTheme;
 
         Utils.applyTheme(state.theme);
 
@@ -185,13 +170,7 @@ export default class UserSettingsAppearance extends React.Component {
                     </div>
                     {custom}
                     <hr />
-                    <strong className='radio'>{'Code Theme'}</strong>
-                    <CodeThemeChooser
-                        theme={this.state.theme}
-                        updateTheme={this.updateCodeTheme}
-                    />
-                    <hr />
-                    {serverError}
+                                {serverError}
                     <a
                         className='btn btn-sm btn-primary'
                         href='#'
diff --git a/web/react/components/user_settings/user_settings_general.jsx b/web/react/components/user_settings/user_settings_general.jsx
index 1c8ce3c795..3adac197ae 100644
--- a/web/react/components/user_settings/user_settings_general.jsx
+++ b/web/react/components/user_settings/user_settings_general.jsx
@@ -570,6 +570,7 @@ export default class UserSettingsGeneralTab extends React.Component {
                 />
             );
         }
+
         return (
             <div>
                 <div className='modal-header'>
diff --git a/web/react/components/user_settings/user_settings_modal.jsx b/web/react/components/user_settings/user_settings_modal.jsx
index 5449ae91e5..18dd490e78 100644
--- a/web/react/components/user_settings/user_settings_modal.jsx
+++ b/web/react/components/user_settings/user_settings_modal.jsx
@@ -43,6 +43,7 @@ export default class UserSettingsModal extends React.Component {
             tabs.push({name: 'integrations', uiName: 'Integrations', icon: 'glyphicon glyphicon-transfer'});
         }
         tabs.push({name: 'display', uiName: 'Display', icon: 'glyphicon glyphicon-eye-open'});
+        tabs.push({name: 'advanced', uiName: 'Advanced', icon: 'glyphicon glyphicon-list-alt'});
 
         return (
             <div
diff --git a/web/react/package.json b/web/react/package.json
index 9af6f58800..e6a6623752 100644
--- a/web/react/package.json
+++ b/web/react/package.json
@@ -6,7 +6,6 @@
     "autolinker": "0.18.1",
     "babel-runtime": "5.8.24",
     "flux": "2.1.1",
-    "highlight.js": "^8.9.1",
     "keymirror": "0.1.1",
     "marked": "0.3.5",
     "object-assign": "3.0.0",
diff --git a/web/react/utils/constants.jsx b/web/react/utils/constants.jsx
index 0e89b94702..69e3b007db 100644
--- a/web/react/utils/constants.jsx
+++ b/web/react/utils/constants.jsx
@@ -302,16 +302,10 @@ module.exports = {
             uiName: 'Mention Highlight Link'
         }
     ],
-    CODE_THEMES: {
-        github: 'GitHub',
-        solarized_light: 'Solarized light',
-        monokai: 'Monokai',
-        solarized_dark: 'Solarized Dark'
-    },
-    DEFAULT_CODE_THEME: 'github',
     Preferences: {
         CATEGORY_DIRECT_CHANNEL_SHOW: 'direct_channel_show',
-        CATEGORY_DISPLAY_SETTINGS: 'display_settings'
+        CATEGORY_DISPLAY_SETTINGS: 'display_settings',
+        CATEGORY_ADVANCED_SETTINGS: 'advanced_settings'
     },
     KeyCodes: {
         UP: 38,
@@ -322,30 +316,5 @@ module.exports = {
         ENTER: 13,
         ESCAPE: 27,
         SPACE: 32
-    },
-    HighlightedLanguages: {
-        diff: 'Diff',
-        apache: 'Apache',
-        makefile: 'Makefile',
-        http: 'HTTP',
-        json: 'JSON',
-        markdown: 'Markdown',
-        javascript: 'JavaScript',
-        css: 'CSS',
-        nginx: 'nginx',
-        objectivec: 'Objective-C',
-        python: 'Python',
-        xml: 'XML',
-        perl: 'Perl',
-        bash: 'Bash',
-        php: 'PHP',
-        coffeescript: 'CoffeeScript',
-        cs: 'C#',
-        cpp: 'C++',
-        sql: 'SQL',
-        go: 'Go',
-        ruby: 'Ruby',
-        java: 'Java',
-        ini: 'ini'
     }
 };
diff --git a/web/react/utils/markdown.jsx b/web/react/utils/markdown.jsx
index ad11a95ace..26587dd6ee 100644
--- a/web/react/utils/markdown.jsx
+++ b/web/react/utils/markdown.jsx
@@ -6,34 +6,6 @@ const Utils = require('./utils.jsx');
 
 const marked = require('marked');
 
-const highlightJs = require('highlight.js/lib/highlight.js');
-const highlightJsDiff = require('highlight.js/lib/languages/diff.js');
-const highlightJsApache = require('highlight.js/lib/languages/apache.js');
-const highlightJsMakefile = require('highlight.js/lib/languages/makefile.js');
-const highlightJsHttp = require('highlight.js/lib/languages/http.js');
-const highlightJsJson = require('highlight.js/lib/languages/json.js');
-const highlightJsMarkdown = require('highlight.js/lib/languages/markdown.js');
-const highlightJsJavascript = require('highlight.js/lib/languages/javascript.js');
-const highlightJsCss = require('highlight.js/lib/languages/css.js');
-const highlightJsNginx = require('highlight.js/lib/languages/nginx.js');
-const highlightJsObjectivec = require('highlight.js/lib/languages/objectivec.js');
-const highlightJsPython = require('highlight.js/lib/languages/python.js');
-const highlightJsXml = require('highlight.js/lib/languages/xml.js');
-const highlightJsPerl = require('highlight.js/lib/languages/perl.js');
-const highlightJsBash = require('highlight.js/lib/languages/bash.js');
-const highlightJsPhp = require('highlight.js/lib/languages/php.js');
-const highlightJsCoffeescript = require('highlight.js/lib/languages/coffeescript.js');
-const highlightJsCs = require('highlight.js/lib/languages/cs.js');
-const highlightJsCpp = require('highlight.js/lib/languages/cpp.js');
-const highlightJsSql = require('highlight.js/lib/languages/sql.js');
-const highlightJsGo = require('highlight.js/lib/languages/go.js');
-const highlightJsRuby = require('highlight.js/lib/languages/ruby.js');
-const highlightJsJava = require('highlight.js/lib/languages/java.js');
-const highlightJsIni = require('highlight.js/lib/languages/ini.js');
-
-const Constants = require('../utils/constants.jsx');
-const HighlightedLanguages = Constants.HighlightedLanguages;
-
 export class MattermostMarkdownRenderer extends marked.Renderer {
     constructor(options, formattingOptions = {}) {
         super(options);
@@ -43,43 +15,6 @@ export class MattermostMarkdownRenderer extends marked.Renderer {
         this.text = this.text.bind(this);
 
         this.formattingOptions = formattingOptions;
-
-        highlightJs.registerLanguage('diff', highlightJsDiff);
-        highlightJs.registerLanguage('apache', highlightJsApache);
-        highlightJs.registerLanguage('makefile', highlightJsMakefile);
-        highlightJs.registerLanguage('http', highlightJsHttp);
-        highlightJs.registerLanguage('json', highlightJsJson);
-        highlightJs.registerLanguage('markdown', highlightJsMarkdown);
-        highlightJs.registerLanguage('javascript', highlightJsJavascript);
-        highlightJs.registerLanguage('css', highlightJsCss);
-        highlightJs.registerLanguage('nginx', highlightJsNginx);
-        highlightJs.registerLanguage('objectivec', highlightJsObjectivec);
-        highlightJs.registerLanguage('python', highlightJsPython);
-        highlightJs.registerLanguage('xml', highlightJsXml);
-        highlightJs.registerLanguage('perl', highlightJsPerl);
-        highlightJs.registerLanguage('bash', highlightJsBash);
-        highlightJs.registerLanguage('php', highlightJsPhp);
-        highlightJs.registerLanguage('coffeescript', highlightJsCoffeescript);
-        highlightJs.registerLanguage('cs', highlightJsCs);
-        highlightJs.registerLanguage('cpp', highlightJsCpp);
-        highlightJs.registerLanguage('sql', highlightJsSql);
-        highlightJs.registerLanguage('go', highlightJsGo);
-        highlightJs.registerLanguage('ruby', highlightJsRuby);
-        highlightJs.registerLanguage('java', highlightJsJava);
-        highlightJs.registerLanguage('ini', highlightJsIni);
-    }
-
-    code(code, language) {
-        if (!language || highlightJs.listLanguages().indexOf(language) < 0) {
-            let parsed = super.code(code, language);
-            return '<code class="hljs">' + $(parsed).text() + '</code>';
-        }
-
-        let parsed = highlightJs.highlight(language, code);
-        return '<div class="post-body--code">' +
-            '<span class="post-body--code__language">' + HighlightedLanguages[language] + '</span>' +
-            '<code style="white-space: pre;" class="hljs">' + parsed.value + '</code>' +
-            '</div>';
     }
 
     br() {
diff --git a/web/react/utils/utils.jsx b/web/react/utils/utils.jsx
index 3140a5d77f..b643c6012c 100644
--- a/web/react/utils/utils.jsx
+++ b/web/react/utils/utils.jsx
@@ -408,11 +408,6 @@ export function toTitleCase(str) {
 }
 
 export function applyTheme(theme) {
-    if (!theme.codeTheme) {
-        theme.codeTheme = Constants.DEFAULT_CODE_THEME;
-    }
-    updateCodeTheme(theme.codeTheme);
-
     if (theme.sidebarBg) {
         changeCss('.sidebar--left, .settings-modal .settings-table .settings-links, .sidebar--menu', 'background:' + theme.sidebarBg, 1);
     }
@@ -599,27 +594,6 @@ export function rgb2hex(rgbIn) {
     return '#' + hex(rgb[1]) + hex(rgb[2]) + hex(rgb[3]);
 }
 
-export function updateCodeTheme(theme) {
-    const path = '/static/css/highlight/' + theme + '.css';
-    const $link = $('link.code_theme');
-    if (path !== $link.attr('href')) {
-        changeCss('code.hljs', 'visibility: hidden');
-        var xmlHTTP = new XMLHttpRequest();
-        xmlHTTP.open('GET', path, true);
-        xmlHTTP.onload = function onLoad() {
-            $link.attr('href', path);
-            if (isBrowserFirefox()) {
-                $link.one('load', () => {
-                    changeCss('code.hljs', 'visibility: visible');
-                });
-            } else {
-                changeCss('code.hljs', 'visibility: visible');
-            }
-        };
-        xmlHTTP.send();
-    }
-}
-
 export function placeCaretAtEnd(el) {
     el.focus();
     if (typeof window.getSelection != 'undefined' && typeof document.createRange != 'undefined') {
diff --git a/web/sass-files/sass/partials/_post.scss b/web/sass-files/sass/partials/_post.scss
index 3fac1fed9d..f5fc1631f3 100644
--- a/web/sass-files/sass/partials/_post.scss
+++ b/web/sass-files/sass/partials/_post.scss
@@ -466,22 +466,6 @@ body.ios {
 			white-space: nowrap;
 			cursor: pointer;
 		}
-		.post-body--code {
-			font-size: .97em;
-			position:relative;
-			.post-body--code__language {
-				position: absolute;
-				right: 0;
-				background: #fff;
-				cursor: default;
-				padding: 0.3em 0.5em 0.1em;
-				border-bottom-left-radius: 4px;
-				@include opacity(.3);
-			}
-			code {
-				white-space: pre;
-			}
-		}
 	}
 	.create-reply-form-wrap {
 		width: 100%;
diff --git a/web/static/css/highlight b/web/static/css/highlight
deleted file mode 120000
index c774cf3974..0000000000
--- a/web/static/css/highlight
+++ /dev/null
@@ -1 +0,0 @@
-../../react/node_modules/highlight.js/styles/
\ No newline at end of file
diff --git a/web/static/images/themes/code_themes/github.png b/web/static/images/themes/code_themes/github.png
deleted file mode 100644
index d0538d6c0b..0000000000
Binary files a/web/static/images/themes/code_themes/github.png and /dev/null differ
diff --git a/web/static/images/themes/code_themes/monokai.png b/web/static/images/themes/code_themes/monokai.png
deleted file mode 100644
index 8f92d2a18d..0000000000
Binary files a/web/static/images/themes/code_themes/monokai.png and /dev/null differ
diff --git a/web/static/images/themes/code_themes/solarized_dark.png b/web/static/images/themes/code_themes/solarized_dark.png
deleted file mode 100644
index 76055c6782..0000000000
Binary files a/web/static/images/themes/code_themes/solarized_dark.png and /dev/null differ
diff --git a/web/static/images/themes/code_themes/solarized_light.png b/web/static/images/themes/code_themes/solarized_light.png
deleted file mode 100644
index b9595c22d7..0000000000
Binary files a/web/static/images/themes/code_themes/solarized_light.png and /dev/null differ
diff --git a/web/templates/head.html b/web/templates/head.html
index fdc371af4a..041831ed7a 100644
--- a/web/templates/head.html
+++ b/web/templates/head.html
@@ -24,7 +24,6 @@
     <link rel="stylesheet" href="/static/css/bootstrap-colorpicker.min.css">
     <link rel="stylesheet" href="/static/css/styles.css">
     <link rel="stylesheet" href="/static/css/google-fonts.css">
-    <link rel="stylesheet" class="code_theme" href="">
 
     <link id="favicon" rel="icon" href="/static/images/favicon.ico" type="image/x-icon">
     <link rel="shortcut icon" href="/static/images/favicon.ico" type="image/x-icon">