diff --git a/adapted-from-phet/js/Brand.js b/adapted-from-phet/js/Brand.js
index b2f841e..1ab01e2 100644
--- a/adapted-from-phet/js/Brand.js
+++ b/adapted-from-phet/js/Brand.js
@@ -1,11 +1,11 @@
 // Copyright 2002-2014, University of Colorado Boulder
 
 // Returns branding information for the simulations, see https://github.com/phetsims/brand/issues/1
-define( function( require ) {
+define( require => {
   'use strict';
 
   // modules
-  var brand = require( 'BRAND/../../js/brand' );
+  const brand = require( 'BRAND/../../js/brand' );
 
   var Brand = {
 
diff --git a/js/brand.js b/js/brand.js
index cd07cd4..1c1264b 100644
--- a/js/brand.js
+++ b/js/brand.js
@@ -5,11 +5,11 @@
  *
  * @author Chris Malley (PixelZoom, Inc.)
  */
-define( function( require ) {
+define( require => {
   'use strict';
 
   // modules
-  var Namespace = require( 'PHET_CORE/Namespace' );
+  const Namespace = require( 'PHET_CORE/Namespace' );
 
   return new Namespace( 'brand' );
 } );
\ No newline at end of file
diff --git a/phet-io/js/Brand.js b/phet-io/js/Brand.js
index c87e092..61ae8e8 100644
--- a/phet-io/js/Brand.js
+++ b/phet-io/js/Brand.js
@@ -1,16 +1,16 @@
 // Copyright 2002-2016, University of Colorado Boulder
 
 // Returns branding information for the simulations, see https://github.com/phetsims/brand/issues/1
-define( function( require ) {
+define( require => {
   'use strict';
 
   // modules
-  var brand = require( 'BRAND/../../js/brand' );
+  const brand = require( 'BRAND/../../js/brand' );
 
   // strings
-  var termsPrivacyAndLicensingString = require( 'string!JOIST/termsPrivacyAndLicensing' );
-  var translationCreditsLinkString = require( 'string!JOIST/translation.credits.link' );
-  var thirdPartyCreditsLinkString = require( 'string!JOIST/thirdParty.credits.link' );
+  const termsPrivacyAndLicensingString = require( 'string!JOIST/termsPrivacyAndLicensing' );
+  const translationCreditsLinkString = require( 'string!JOIST/translation.credits.link' );
+  const thirdPartyCreditsLinkString = require( 'string!JOIST/thirdParty.credits.link' );
 
   // Documentation for all properties is available in brand/adapted-from-phet/js/Brand.js
   var Brand = {
diff --git a/phet/js/Brand.js b/phet/js/Brand.js
index 1bd641b..1088d05 100644
--- a/phet/js/Brand.js
+++ b/phet/js/Brand.js
@@ -1,16 +1,16 @@
 // Copyright 2002-2014, University of Colorado Boulder
 
 // Returns branding information for the simulations, see https://github.com/phetsims/brand/issues/1
-define( function( require ) {
+define( require => {
   'use strict';
 
   // modules
-  var brand = require( 'BRAND/../../js/brand' );
+  const brand = require( 'BRAND/../../js/brand' );
 
   // strings
-  var termsPrivacyAndLicensingString = require( 'string!JOIST/termsPrivacyAndLicensing' );
-  var translationCreditsLinkString = require( 'string!JOIST/translation.credits.link' );
-  var thirdPartyCreditsLinkString = require( 'string!JOIST/thirdParty.credits.link' );
+  const termsPrivacyAndLicensingString = require( 'string!JOIST/termsPrivacyAndLicensing' );
+  const translationCreditsLinkString = require( 'string!JOIST/translation.credits.link' );
+  const thirdPartyCreditsLinkString = require( 'string!JOIST/thirdParty.credits.link' );
 
   // Documentation for all properties is available in brand/adapted-from-phet/js/Brand.js
   var Brand = {