diff --git a/projects/demo/src/index.html b/projects/demo/src/index.html
index ca2270c130b0..c7c267c15718 100644
--- a/projects/demo/src/index.html
+++ b/projects/demo/src/index.html
@@ -164,7 +164,6 @@
             rel="prefetch"
         />
         <title>Taiga UI</title>
-        <script src="https://cdn.polyfill.io/v3/polyfill.min.js?features=Reflect"></script>
     </head>
     <body>
         <app></app>
diff --git a/projects/demo/src/polyfills.ts b/projects/demo/src/polyfills.ts
index aa09a9ff6ae6..07359d0dff4b 100644
--- a/projects/demo/src/polyfills.ts
+++ b/projects/demo/src/polyfills.ts
@@ -1 +1,2 @@
+import 'core-js/es6/reflect';
 import 'zone.js';
