diff --git a/lib/src/polyfills.ts b/lib/src/polyfills.ts
index b46d37b..4de6837 100644
--- a/lib/src/polyfills.ts
+++ b/lib/src/polyfills.ts
@@ -1,4 +1,8 @@
 import 'core-js/es/array/find';
+import 'core-js/es/array/includes';
 import 'core-js/es/object/assign';
 import 'core-js/es/object/entries';
 import 'core-js/es/object/get-own-property-descriptors';
+import 'core-js/es/map';
+import 'core-js/es/set';
+import 'core-js/es/symbol';
diff --git a/lib/src/sentry.ts b/lib/src/sentry.ts
index 42c353c..255b4bd 100644
--- a/lib/src/sentry.ts
+++ b/lib/src/sentry.ts
@@ -24,7 +24,7 @@ export function initSentry(
 
   const client = new Sentry.BrowserClient({
     dsn: SENTRY_DSN,
-    transport: Sentry.makeFetchTransport,
+    transport: window.fetch ? Sentry.makeFetchTransport : Sentry.makeXHRTransport,
     stackParser: Sentry.defaultStackParser,
     integrations: [
       new Sentry.Breadcrumbs(),
diff --git a/package.json b/package.json
index 89b6320..7419860 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@hcaptcha/loader",
   "description": "This is a JavaScript library to easily configure the loading of the hCaptcha JS client SDK with built-in error handling.",
-  "version": "1.2.2",
+  "version": "1.2.3",
   "author": "hCaptcha team and contributors",
   "license": "MIT",
   "keywords": [