diff --git a/.eslintrc.yml b/.eslintrc.yml
index 8d1bbc43a7..2176618fa4 100644
--- a/.eslintrc.yml
+++ b/.eslintrc.yml
@@ -21,22 +21,10 @@ parserOptions:
 
 rules:
 
-  no-cond-assign: error
-  no-console: warn
-  no-irregular-whitespace: error
-  no-unreachable: error
-  valid-typeof: error
-  consistent-return: error
-  dot-notation: error
-  eqeqeq: error
-  no-fallthrough: error
-  no-unused-expressions: error
-  strict: off
-  no-catch-shadow: error
-  indent:
-  - warn
-  - 2
   brace-style: warn
+  comma-dangle:
+  - error
+  - always-multiline
   comma-spacing:
   - warn
   - before: false
@@ -44,25 +32,43 @@ rules:
   comma-style:
   - warn
   - last
+  consistent-return: error
+  dot-notation: error
+  eqeqeq: error
+  indent:
+  - warn
+  - 2
+  jsx-quotes:
+  - error
+  - prefer-single
+  no-catch-shadow: error
+  no-cond-assign: error
+  no-console: warn
+  no-fallthrough: error
+  no-irregular-whitespace: error
   no-mixed-spaces-and-tabs: warn
   no-nested-ternary: warn
   no-trailing-spaces: warn
-  semi: error
-  padded-blocks:
-  - error
-  - classes: always
-  comma-dangle:
-  - error
-  - always-multiline
+  no-unreachable: error
+  no-unused-expressions: error
   object-curly-spacing:
   - error
   - always
+  padded-blocks:
+  - error
+  - classes: always
+  quotes:
+  - error
+  - single
+  semi: error
+  strict: off
+  valid-typeof: error
 
-  react/jsx-wrap-multilines: error
   react/jsx-no-bind: error
-  react/self-closing-comp: error
-  react/prop-types: error
+  react/jsx-wrap-multilines: error
   react/no-multi-comp: off
+  react/prop-types: error
+  react/self-closing-comp: error
 
   jsx-a11y/accessible-emoji: warn
   jsx-a11y/anchor-has-content: warn
diff --git a/app/javascript/mastodon/components/avatar_overlay.js b/app/javascript/mastodon/components/avatar_overlay.js
index e41d66ab10..c82c896372 100644
--- a/app/javascript/mastodon/components/avatar_overlay.js
+++ b/app/javascript/mastodon/components/avatar_overlay.js
@@ -21,8 +21,8 @@ class AvatarOverlay extends React.PureComponent {
 
     return (
       <div className='account__avatar-overlay'>
-        <div className="account__avatar-overlay-base" style={baseStyle} />
-        <div className="account__avatar-overlay-overlay" style={overlayStyle} />
+        <div className='account__avatar-overlay-base' style={baseStyle} />
+        <div className='account__avatar-overlay-overlay' style={overlayStyle} />
       </div>
     );
   }
diff --git a/app/javascript/mastodon/components/dropdown_menu.js b/app/javascript/mastodon/components/dropdown_menu.js
index 4fe4db313c..e637c5f790 100644
--- a/app/javascript/mastodon/components/dropdown_menu.js
+++ b/app/javascript/mastodon/components/dropdown_menu.js
@@ -17,7 +17,7 @@ class DropdownMenu extends React.PureComponent {
   };
 
   static defaultProps = {
-    ariaLabel: "Menu",
+    ariaLabel: 'Menu',
   };
 
   state = {
@@ -70,7 +70,7 @@ class DropdownMenu extends React.PureComponent {
   render () {
     const { icon, items, size, direction, ariaLabel } = this.props;
     const { expanded } = this.state;
-    const directionClass = (direction === "left") ? "dropdown__left" : "dropdown__right";
+    const directionClass = (direction === 'left') ? 'dropdown__left' : 'dropdown__right';
 
     const dropdownItems = expanded && (
       <ul className='dropdown__content-list'>
diff --git a/app/javascript/mastodon/components/status_action_bar.js b/app/javascript/mastodon/components/status_action_bar.js
index 064d841b84..c63457b4bd 100644
--- a/app/javascript/mastodon/components/status_action_bar.js
+++ b/app/javascript/mastodon/components/status_action_bar.js
@@ -128,10 +128,10 @@ class StatusActionBar extends ImmutablePureComponent {
     }
 
     if (status.get('in_reply_to_id', null) === null) {
-      replyIcon = "reply";
+      replyIcon = 'reply';
       replyTitle = intl.formatMessage(messages.reply);
     } else {
-      replyIcon = "reply-all";
+      replyIcon = 'reply-all';
       replyTitle = intl.formatMessage(messages.replyAll);
     }
 
@@ -142,7 +142,7 @@ class StatusActionBar extends ImmutablePureComponent {
         <IconButton className='status__action-bar-button star-icon' animate={true} active={status.get('favourited')} title={intl.formatMessage(messages.favourite)} icon='star' onClick={this.handleFavouriteClick} />
 
         <div className='status__action-bar-dropdown'>
-          <DropdownMenu items={menu} icon='ellipsis-h' size={18} direction="right" ariaLabel="More"/>
+          <DropdownMenu items={menu} icon='ellipsis-h' size={18} direction='right' ariaLabel='More'/>
         </div>
       </div>
     );
diff --git a/app/javascript/mastodon/containers/mastodon.js b/app/javascript/mastodon/containers/mastodon.js
index 1d481d890e..6d1c3f9837 100644
--- a/app/javascript/mastodon/containers/mastodon.js
+++ b/app/javascript/mastodon/containers/mastodon.js
@@ -49,7 +49,7 @@ const { localeData, messages } = getLocale();
 addLocaleData(localeData);
 
 const store = configureStore();
-const initialState = JSON.parse(document.getElementById("initial-state").textContent);
+const initialState = JSON.parse(document.getElementById('initial-state').textContent);
 store.dispatch(hydrateStore(initialState));
 
 const browserHistory = useRouterHistory(createBrowserHistory)({
diff --git a/app/javascript/mastodon/features/account/components/action_bar.js b/app/javascript/mastodon/features/account/components/action_bar.js
index 56ebefd777..15fdd1a50b 100644
--- a/app/javascript/mastodon/features/account/components/action_bar.js
+++ b/app/javascript/mastodon/features/account/components/action_bar.js
@@ -81,7 +81,7 @@ class ActionBar extends React.PureComponent {
     return (
       <div className='account__action-bar'>
         <div className='account__action-bar-dropdown'>
-          <DropdownMenu items={menu} icon='bars' size={24} direction="right" />
+          <DropdownMenu items={menu} icon='bars' size={24} direction='right' />
         </div>
 
         <div className='account__action-bar-links'>
diff --git a/app/javascript/mastodon/features/compose/components/compose_form.js b/app/javascript/mastodon/features/compose/components/compose_form.js
index f8a9a94acf..f413c27927 100644
--- a/app/javascript/mastodon/features/compose/components/compose_form.js
+++ b/app/javascript/mastodon/features/compose/components/compose_form.js
@@ -151,8 +151,8 @@ class ComposeForm extends ImmutablePureComponent {
     return (
       <div className='compose-form'>
         <Collapsable isVisible={this.props.spoiler} fullHeight={50}>
-          <div className="spoiler-input">
-            <input placeholder={intl.formatMessage(messages.spoiler_placeholder)} value={this.props.spoiler_text} onChange={this.handleChangeSpoilerText} onKeyDown={this.handleKeyDown} type="text" className="spoiler-input__input"  id='cw-spoiler-input'/>
+          <div className='spoiler-input'>
+            <input placeholder={intl.formatMessage(messages.spoiler_placeholder)} value={this.props.spoiler_text} onChange={this.handleChangeSpoilerText} onKeyDown={this.handleKeyDown} type='text' className='spoiler-input__input'  id='cw-spoiler-input'/>
           </div>
         </Collapsable>
 
@@ -193,7 +193,7 @@ class ComposeForm extends ImmutablePureComponent {
 
           <div className='compose-form__publish'>
             <div className='character-counter__wrapper'><CharacterCounter max={500} text={text} /></div>
-            <div className='compose-form__publish-button-wrapper'><Button text={publishText} onClick={this.handleSubmit} disabled={disabled || this.props.is_uploading || text.replace(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g, "_").length > 500 || (text.length !==0 && text.trim().length === 0)} block /></div>
+            <div className='compose-form__publish-button-wrapper'><Button text={publishText} onClick={this.handleSubmit} disabled={disabled || this.props.is_uploading || text.replace(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g, '_').length > 500 || (text.length !==0 && text.trim().length === 0)} block /></div>
           </div>
         </div>
       </div>
diff --git a/app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.js b/app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.js
index ffe5a1bcdf..b6682f8d36 100644
--- a/app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.js
+++ b/app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.js
@@ -106,9 +106,9 @@ class EmojiPickerDropdown extends React.PureComponent {
     return (
       <Dropdown ref={this.setRef} className='emoji-picker__dropdown' onShow={this.onShowDropdown} onHide={this.onHideDropdown}>
         <DropdownTrigger className='emoji-button' title={intl.formatMessage(messages.emoji)}>
-          <img draggable="false"
-               className={`emojione ${active && loading ? "pulse-loading" : ''}`}
-               alt="🙂" src="/emoji/1f602.svg" />
+          <img draggable='false'
+               className={`emojione ${active && loading ? 'pulse-loading' : ''}`}
+               alt='🙂' src='/emoji/1f602.svg' />
         </DropdownTrigger>
         <DropdownContent className='dropdown__left'>
           {
diff --git a/app/javascript/mastodon/features/compose/index.js b/app/javascript/mastodon/features/compose/index.js
index 62d991ed10..e7d933e867 100644
--- a/app/javascript/mastodon/features/compose/index.js
+++ b/app/javascript/mastodon/features/compose/index.js
@@ -49,11 +49,11 @@ class Compose extends React.PureComponent {
     if (multiColumn) {
       header = (
         <div className='drawer__header'>
-          <Link to='/getting-started' className='drawer__tab' title={intl.formatMessage(messages.start)}><i role="img" aria-label={intl.formatMessage(messages.start)} className='fa fa-fw fa-asterisk' /></Link>
-          <Link to='/timelines/public/local' className='drawer__tab' title={intl.formatMessage(messages.community)}><i role="img" aria-label={intl.formatMessage(messages.community)} className='fa fa-fw fa-users' /></Link>
-          <Link to='/timelines/public' className='drawer__tab' title={intl.formatMessage(messages.public)}><i role="img" aria-label={intl.formatMessage(messages.public)} className='fa fa-fw fa-globe' /></Link>
-          <a href='/settings/preferences' className='drawer__tab' title={intl.formatMessage(messages.preferences)}><i role="img" aria-label={intl.formatMessage(messages.preferences)} className='fa fa-fw fa-cog' /></a>
-          <a href='/auth/sign_out' className='drawer__tab' data-method='delete' title={intl.formatMessage(messages.logout)}><i role="img" aria-label={intl.formatMessage(messages.logout)} className='fa fa-fw fa-sign-out' /></a>
+          <Link to='/getting-started' className='drawer__tab' title={intl.formatMessage(messages.start)}><i role='img' aria-label={intl.formatMessage(messages.start)} className='fa fa-fw fa-asterisk' /></Link>
+          <Link to='/timelines/public/local' className='drawer__tab' title={intl.formatMessage(messages.community)}><i role='img' aria-label={intl.formatMessage(messages.community)} className='fa fa-fw fa-users' /></Link>
+          <Link to='/timelines/public' className='drawer__tab' title={intl.formatMessage(messages.public)}><i role='img' aria-label={intl.formatMessage(messages.public)} className='fa fa-fw fa-globe' /></Link>
+          <a href='/settings/preferences' className='drawer__tab' title={intl.formatMessage(messages.preferences)}><i role='img' aria-label={intl.formatMessage(messages.preferences)} className='fa fa-fw fa-cog' /></a>
+          <a href='/auth/sign_out' className='drawer__tab' data-method='delete' title={intl.formatMessage(messages.logout)}><i role='img' aria-label={intl.formatMessage(messages.logout)} className='fa fa-fw fa-sign-out' /></a>
         </div>
       );
     }
diff --git a/app/javascript/mastodon/features/getting_started/index.js b/app/javascript/mastodon/features/getting_started/index.js
index b7ae7743e5..e430f8b140 100644
--- a/app/javascript/mastodon/features/getting_started/index.js
+++ b/app/javascript/mastodon/features/getting_started/index.js
@@ -94,9 +94,9 @@ class GettingStarted extends ImmutablePureComponent {
                 id='getting_started.support'
                 defaultMessage='{faq} • {userguide} • {apps}'
                 values={{
-                  faq: <a href="https://github.com/tootsuite/documentation/blob/master/Using-Mastodon/FAQ.md" rel="noopener" target="_blank"><FormattedMessage id='getting_started.faq' defaultMessage='FAQ' /></a>,
-                  userguide: <a href="https://github.com/tootsuite/documentation/blob/master/Using-Mastodon/User-guide.md" rel="noopener" target="_blank"><FormattedMessage id='getting_started.userguide' defaultMessage='User Guide' /></a>,
-                  apps: <a href="https://github.com/tootsuite/documentation/blob/master/Using-Mastodon/Apps.md" rel="noopener" target="_blank"><FormattedMessage id='getting_started.appsshort' defaultMessage='Apps' /></a>,
+                  faq: <a href='https://github.com/tootsuite/documentation/blob/master/Using-Mastodon/FAQ.md' rel='noopener' target='_blank'><FormattedMessage id='getting_started.faq' defaultMessage='FAQ' /></a>,
+                  userguide: <a href='https://github.com/tootsuite/documentation/blob/master/Using-Mastodon/User-guide.md' rel='noopener' target='_blank'><FormattedMessage id='getting_started.userguide' defaultMessage='User Guide' /></a>,
+                  apps: <a href='https://github.com/tootsuite/documentation/blob/master/Using-Mastodon/Apps.md' rel='noopener' target='_blank'><FormattedMessage id='getting_started.appsshort' defaultMessage='Apps' /></a>,
                 }}
               />
             </p>
@@ -104,7 +104,7 @@ class GettingStarted extends ImmutablePureComponent {
               <FormattedMessage
                 id='getting_started.open_source_notice'
                 defaultMessage='Mastodon is open source software. You can contribute or report issues on GitHub at {github}.'
-                values={{ github: <a href="https://github.com/tootsuite/mastodon" rel="noopener" target="_blank">tootsuite/mastodon</a> }}
+                values={{ github: <a href='https://github.com/tootsuite/mastodon' rel='noopener' target='_blank'>tootsuite/mastodon</a> }}
               />
             </p>
           </div>
diff --git a/app/javascript/mastodon/features/home_timeline/index.js b/app/javascript/mastodon/features/home_timeline/index.js
index a8d2133402..7439bf3a1e 100644
--- a/app/javascript/mastodon/features/home_timeline/index.js
+++ b/app/javascript/mastodon/features/home_timeline/index.js
@@ -59,7 +59,7 @@ class HomeTimeline extends React.PureComponent {
     let emptyMessage;
 
     if (hasFollows) {
-      emptyMessage = <FormattedMessage id='empty_column.home.inactivity' defaultMessage="Your home feed is empty. If you have been inactive for a while, it will be regenerated for you soon." />;
+      emptyMessage = <FormattedMessage id='empty_column.home.inactivity' defaultMessage='Your home feed is empty. If you have been inactive for a while, it will be regenerated for you soon.' />;
     } else {
       emptyMessage = <FormattedMessage id='empty_column.home' defaultMessage="You aren't following anyone yet. Visit {public} or use search to get started and meet other users." values={{ public: <Link to='/timelines/public'><FormattedMessage id='empty_column.home.public_timeline' defaultMessage='the public timeline' /></Link> }} />;
     }
diff --git a/app/javascript/mastodon/features/status/components/action_bar.js b/app/javascript/mastodon/features/status/components/action_bar.js
index f2ae4f2594..0e0d72a2a9 100644
--- a/app/javascript/mastodon/features/status/components/action_bar.js
+++ b/app/javascript/mastodon/features/status/components/action_bar.js
@@ -84,7 +84,7 @@ class ActionBar extends React.PureComponent {
         <div className='detailed-status__button'><IconButton animate={true} active={status.get('favourited')} title={intl.formatMessage(messages.favourite)} icon='star' onClick={this.handleFavouriteClick} activeStyle={{ color: '#ca8f04' }} /></div>
 
         <div className='detailed-status__action-bar-dropdown'>
-          <DropdownMenu size={18} icon='ellipsis-h' items={menu} direction="left" ariaLabel="More" />
+          <DropdownMenu size={18} icon='ellipsis-h' items={menu} direction='left' ariaLabel='More' />
         </div>
       </div>
     );
diff --git a/app/javascript/mastodon/features/ui/index.js b/app/javascript/mastodon/features/ui/index.js
index 9452e7fcf6..5e70c888c2 100644
--- a/app/javascript/mastodon/features/ui/index.js
+++ b/app/javascript/mastodon/features/ui/index.js
@@ -121,7 +121,7 @@ class UI extends React.PureComponent {
         <TabsBar />
         <ColumnsAreaContainer singleColumn={isMobile(width)}>{children}</ColumnsAreaContainer>
         <NotificationsContainer />
-        <LoadingBarContainer className="loading-bar" />
+        <LoadingBarContainer className='loading-bar' />
         <ModalContainer />
         <UploadArea active={draggingOver} onClose={this.closeUploadModal} />
       </div>
diff --git a/app/javascript/mastodon/locales/locale-data/oc.js b/app/javascript/mastodon/locales/locale-data/oc.js
index 5a85866c83..c4b56350b7 100644
--- a/app/javascript/mastodon/locales/locale-data/oc.js
+++ b/app/javascript/mastodon/locales/locale-data/oc.js
@@ -1,5 +1,6 @@
 /*eslint eqeqeq: "off"*/
 /*eslint no-nested-ternary: "off"*/
+/*eslint quotes: "off"*/
 
 export default [{
   locale: "oc",
diff --git a/config/webpack/development.server.js b/config/webpack/development.server.js
index 4e11df4cb3..8e8a399e8a 100644
--- a/config/webpack/development.server.js
+++ b/config/webpack/development.server.js
@@ -10,7 +10,7 @@ module.exports = merge(devConfig, {
   devServer: {
     host: env.LOCAL_DOMAIN ? '0.0.0.0' : devServer.host,
     port: devServer.port,
-    headers: { "Access-Control-Allow-Origin": "*" },
+    headers: { 'Access-Control-Allow-Origin': '*' },
     compress: true,
     historyApiFallback: true,
     contentBase: resolve(paths.output, paths.entry),
diff --git a/config/webpack/generateLocalePacks.js b/config/webpack/generateLocalePacks.js
index 10a66e994d..b71cf2ade3 100644
--- a/config/webpack/generateLocalePacks.js
+++ b/config/webpack/generateLocalePacks.js
@@ -30,7 +30,7 @@ locales.forEach(locale => {
     // then check locales/locale-data
     `../../app/javascript/mastodon/locales/locale-data/${baseLocale}.js`,
     // fall back to English (this is what react-intl does anyway)
-    `../../node_modules/react-intl/locale-data/en.js`,
+    '../../node_modules/react-intl/locale-data/en.js',
   ].filter(filename => fs.existsSync(path.join(outPath, filename)))
     .map(filename => filename.replace(/..\/..\/node_modules\//, ''))[0];
 
diff --git a/config/webpack/translationRunner.js b/config/webpack/translationRunner.js
index a546125494..8145c605ff 100644
--- a/config/webpack/translationRunner.js
+++ b/config/webpack/translationRunner.js
@@ -34,11 +34,11 @@ const validateLanguages = function (languages, validators) {
   }, []);
 
   if (invalidLanguages.length > 0) {
-    console.log(`\nError: Specified invalid LANGUAGES:`);
+    console.log('\nError: Specified invalid LANGUAGES:');
     for (let { language, error } of invalidLanguages) {
       console.error(`* ${language}: ${error}`);
     }
-    console.log(`\nUse yarn "manage:translations -- --help" for usage information\n`);
+    console.log('\nUse yarn "manage:translations -- --help" for usage information\n');
     process.exit(1);
   }
 };
@@ -95,7 +95,7 @@ if (argv.help) {
 // check if message directory exists
 if (!fs.existsSync(`${process.cwd()}/${messagesDirectory}`)) {
   console.error(`\nError: messageDirectory not exists\n(${process.cwd()}/${messagesDirectory})\n`);
-  console.error(`Try to run "yarn build:development" first`);
+  console.error('Try to run "yarn build:development" first');
   process.exit(1);
 }
 
diff --git a/spec/javascript/components/features/ui/components/column.test.js b/spec/javascript/components/features/ui/components/column.test.js
index df0f43e601..4491d6e19b 100644
--- a/spec/javascript/components/features/ui/components/column.test.js
+++ b/spec/javascript/components/features/ui/components/column.test.js
@@ -13,8 +13,8 @@ describe('<Column />', () => {
 
     it('runs the scroll animation if the column contains scrollable content', () => {
       const wrapper = mount(
-        <Column heading="notifications">
-          <div className="scrollable" />
+        <Column heading='notifications'>
+          <div className='scrollable' />
         </Column>
       );
       wrapper.find(ColumnHeader).simulate('click');
@@ -22,7 +22,7 @@ describe('<Column />', () => {
     });
 
     it('does not try to scroll if there is no scrollable content', () => {
-      const wrapper = mount(<Column heading="notifications" />);
+      const wrapper = mount(<Column heading='notifications' />);
       wrapper.find(ColumnHeader).simulate('click');
       expect(global.requestAnimationFrame.called).to.equal(false);
     });