diff --git a/src/client/components/Alerts.js b/src/client/components/Alerts.js
index 78a6d8a..bfb95dc 100644
--- a/src/client/components/Alerts.js
+++ b/src/client/components/Alerts.js
@@ -8,7 +8,7 @@ export const AlertPropType = PropTypes.shape({
   message: PropTypes.string.isRequired
 })
 
-export class Alert extends React.Component {
+export class Alert extends React.PureComponent {
   static propTypes = {
     alert: AlertPropType,
     dismiss: PropTypes.func.isRequired
@@ -34,7 +34,7 @@ export class Alert extends React.Component {
   }
 }
 
-export default class Alerts extends React.Component {
+export default class Alerts extends React.PureComponent {
   static propTypes = {
     alerts: PropTypes.arrayOf(AlertPropType).isRequired,
     dismiss: PropTypes.func.isRequired
diff --git a/src/client/components/App.js b/src/client/components/App.js
index 6b627c5..0e6fbb8 100644
--- a/src/client/components/App.js
+++ b/src/client/components/App.js
@@ -7,7 +7,7 @@ import React from 'react'
 import Video from './Video.js'
 import _ from 'underscore'
 
-export default class App extends React.Component {
+export default class App extends React.PureComponent {
   static propTypes = {
     active: PropTypes.string,
     alerts: PropTypes.arrayOf(AlertPropType).isRequired,
diff --git a/src/client/components/Input.js b/src/client/components/Input.js
index 734f0c2..bdade9a 100644
--- a/src/client/components/Input.js
+++ b/src/client/components/Input.js
@@ -1,7 +1,7 @@
 import PropTypes from 'prop-types'
 import React from 'react'
 
-export default class Input extends React.Component {
+export default class Input extends React.PureComponent {
   static propTypes = {
     notify: PropTypes.func.isRequired,
     sendMessage: PropTypes.func.isRequired
diff --git a/src/client/components/Notifications.js b/src/client/components/Notifications.js
index 5cf07bf..7deb950 100644
--- a/src/client/components/Notifications.js
+++ b/src/client/components/Notifications.js
@@ -9,7 +9,7 @@ export const NotificationPropTypes = PropTypes.shape({
   message: PropTypes.string.isRequired
 })
 
-export default class Notifications extends React.Component {
+export default class Notifications extends React.PureComponent {
   static propTypes = {
     notifications: PropTypes.objectOf(NotificationPropTypes).isRequired,
     max: PropTypes.number.isRequired
diff --git a/src/client/components/Video.js b/src/client/components/Video.js
index fac6378..80f2cce 100644
--- a/src/client/components/Video.js
+++ b/src/client/components/Video.js
@@ -3,7 +3,7 @@ import React from 'react'
 import classnames from 'classnames'
 import { ME } from '../constants.js'
 
-export default class Video extends React.Component {
+export default class Video extends React.PureComponent {
   static propTypes = {
     onClick: PropTypes.func,
     active: PropTypes.bool.isRequired,