diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 323f246..e101b39 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,4 +1,4 @@
-Welcome! Thanks for your interest in contributing to download.jqueryui.com. You're **almost** in the right place. More information on how to contribute to this and all other jQuery Foundation projects is over at [contribute.jquery.org](https://contribute.jquery.org). You'll definitely want to take a look at the articles on contributing [to our websites](https://contribute.jquery.org/web-sites/).
+Welcome! Thanks for your interest in contributing to `jquery-ui-themeroller`. You're **almost** in the right place. More information on how to contribute to this and all other jQuery projects is over at [contribute.jquery.org](https://contribute.jquery.org). You'll definitely want to take a look at the articles on contributing [to our websites](https://contribute.jquery.org/web-sites/).
 
 You may also want to take a look at our [commit & pull request guide](https://contribute.jquery.org/commits-and-pull-requests/) and [style guides](https://contribute.jquery.org/style-guide/) for instructions on how to maintain your fork and submit your code. Before we can merge any pull request, we'll also need you to sign our [contributor license agreement](https://contribute.jquery.org/cla).
 
diff --git a/LICENSE.txt b/LICENSE.txt
index ce90067..1b74d3a 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -1,4 +1,4 @@
-Copyright jQuery Foundation and other contributors, https://jquery.org/
+Copyright OpenJS Foundation and other contributors, https://jquery.org/
 
 This software consists of voluntary contributions made by many
 individuals. For exact contribution history, see the revision history
diff --git a/test/fixtures/jquery-ui-1.13.2/base/theme.css b/test/fixtures/jquery-ui-1.13.3/base/theme.css
similarity index 99%
rename from test/fixtures/jquery-ui-1.13.2/base/theme.css
rename to test/fixtures/jquery-ui-1.13.3/base/theme.css
index 5764830..a759d20 100644
--- a/test/fixtures/jquery-ui-1.13.2/base/theme.css
+++ b/test/fixtures/jquery-ui-1.13.3/base/theme.css
@@ -1,8 +1,8 @@
 /*!
- * jQuery UI CSS Framework 1.13.2
+ * jQuery UI CSS Framework 1.13.3
  * https://jqueryui.com
  *
- * Copyright jQuery Foundation and other contributors
+ * Copyright OpenJS Foundation and other contributors
  * Released under the MIT license.
  * https://jquery.org/license
  *
diff --git a/test/fixtures/jquery-ui-1.13.2/themes/smoothness.css b/test/fixtures/jquery-ui-1.13.3/themes/smoothness.css
similarity index 99%
rename from test/fixtures/jquery-ui-1.13.2/themes/smoothness.css
rename to test/fixtures/jquery-ui-1.13.3/themes/smoothness.css
index ed45916..812c354 100644
--- a/test/fixtures/jquery-ui-1.13.2/themes/smoothness.css
+++ b/test/fixtures/jquery-ui-1.13.3/themes/smoothness.css
@@ -1,8 +1,8 @@
 /*!
- * jQuery UI CSS Framework 1.13.2
+ * jQuery UI CSS Framework 1.13.3
  * https://jqueryui.com
  *
- * Copyright jQuery Foundation and other contributors
+ * Copyright OpenJS Foundation and other contributors
  * Released under the MIT license.
  * https://jquery.org/license
  *
diff --git a/test/themeroller.js b/test/themeroller.js
index b1d5dfa..df44fd9 100644
--- a/test/themeroller.js
+++ b/test/themeroller.js
@@ -9,7 +9,7 @@ const dirname = path.dirname( fileURLToPath( import.meta.url ) );
 describe( "ThemeRoller", function() {
 	let theme;
 
-	[ "1.12.1", "1.13.2" ].forEach( ( jQueryUiVersion ) => {
+	[ "1.12.1", "1.13.3" ].forEach( ( jQueryUiVersion ) => {
 		describe( `with jQuery UI ${ jQueryUiVersion }`, function() {
 			beforeEach( async function() {
 				const baseThemeCss = await fs.readFile( `${ dirname }/fixtures/jquery-ui-${ jQueryUiVersion }/base/theme.css`, "utf-8" );