diff --git a/src/index.tsx b/src/index.tsx
index fd3ec6be..ef9baa7f 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -16,6 +16,8 @@ import App from './app/pages/App';
 // import i18n (needs to be bundled ;))
 import './app/i18n';
 
+enableMapSet();
+
 document.body.classList.add(configClass, varsClass);
 
 if ('serviceWorker' in navigator) {