diff --git a/assets/src/js/app.js b/assets/src/js/app.js
index 06c3d9447e..aecec5c024 100644
--- a/assets/src/js/app.js
+++ b/assets/src/js/app.js
@@ -6,7 +6,6 @@ import { setupLoadMore } from './load_more';
 import { setupPDFIcon } from './pdf_icon';
 import { setupSearch } from './search';
 import { setupExternalLinks } from './external_links';
-import { setupCSSVarsPonyfill } from './cssvarsponyfill';
 import { setupEnhancedDonateButton } from './enhancedDonateButton';
 
 import 'bootstrap';
@@ -28,6 +27,5 @@ jQuery(function($) {
   setupPDFIcon($);
   setupSearch($);
   setupExternalLinks($);
-  setupCSSVarsPonyfill();
   setupEnhancedDonateButton();
 });
diff --git a/assets/src/js/cssvarsponyfill.js b/assets/src/js/cssvarsponyfill.js
deleted file mode 100644
index 53aa2917d7..0000000000
--- a/assets/src/js/cssvarsponyfill.js
+++ /dev/null
@@ -1,4 +0,0 @@
-/* global cssVars */
-export const setupCSSVarsPonyfill = () => {
-  cssVars();
-};
diff --git a/src/MasterSite.php b/src/MasterSite.php
index b5a00e5ece..ae37e525b5 100644
--- a/src/MasterSite.php
+++ b/src/MasterSite.php
@@ -712,7 +712,6 @@ public function enqueue_public_assets() {
 
 		// JS files.
 		wp_register_script( 'jquery', 'https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js', [], '3.3.1', true );
-		wp_register_script( 'cssvarsponyfill', 'https://cdnjs.cloudflare.com/ajax/libs/css-vars-ponyfill/2.3.1/css-vars-ponyfill.min.js', [], '2', false );
 
 		// Variables reflected from PHP to the JS side.
 		$localized_variables = [
@@ -722,7 +721,7 @@ public function enqueue_public_assets() {
 			'show_scroll_times' => Search::SHOW_SCROLL_TIMES,
 		];
 
-		wp_register_script( 'main', $this->theme_dir . '/assets/build/index.js', [ 'jquery', 'cssvarsponyfill' ], $js_creation, true );
+		wp_register_script( 'main', $this->theme_dir . '/assets/build/index.js', [ 'jquery' ], $js_creation, true );
 		wp_localize_script( 'main', 'localizations', $localized_variables );
 		wp_enqueue_script( 'main' );
 	}