diff --git a/docs/browser-support.md b/docs/browser-support.md
index 9b2e162cf5d..3b4a5f1701c 100644
--- a/docs/browser-support.md
+++ b/docs/browser-support.md
@@ -23,7 +23,7 @@ As of **2023-07-27**, we support the following browsers:
 
 ### Polyfills
 
-We use polyfill.io (see `site/SiteConstants.ts`), so using modern methods like `str.replaceAll()` is fine as long as it's included in the list of polyfilled functions.
+We use cdnjs.cloudflare.com/polyfill (see `site/SiteConstants.ts`), so using modern methods like `str.replaceAll()` is fine as long as it's included in the list of polyfilled functions.
 
 ### Setting the Vite `target`
 
diff --git a/site/SiteConstants.ts b/site/SiteConstants.ts
index 5c90cf94a50..e12a31a47a0 100644
--- a/site/SiteConstants.ts
+++ b/site/SiteConstants.ts
@@ -1,4 +1,4 @@
-// See https://polyfill.io/v3/url-builder/ for a list of all supported features
+// See https://cdnjs.cloudflare.com/polyfill/v3/url-builder/ for a list of all supported features
 const polyfillFeatures = [
     "es2019", // Array.flat, Array.flatMap, Object.fromEntries, ...
     "es2020", // String.matchAll, Promise.allSettled, ...
@@ -9,6 +9,6 @@ const polyfillFeatures = [
     "ResizeObserver",
     "globalThis", // some dependencies use this
 ]
-export const POLYFILL_URL: string = `https://polyfill.io/v3/polyfill.min.js?features=${polyfillFeatures.join(
+export const POLYFILL_URL: string = `https://cdnjs.cloudflare.com/polyfill/v3/polyfill.min.js?features=${polyfillFeatures.join(
     ","
 )}`