diff --git a/babel.config.js b/babel.config.js
index 55efafc40..4f67cc36d 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -20,6 +20,7 @@ module.exports = (api) => {
       ['react-intl', { messagesDir: './build/messages/' }],
       'preval',
     ],
+    'sourceType': 'unambiguous',
   };
 
   switch (env) {
@@ -62,4 +63,3 @@ module.exports = (api) => {
 
   return config;
 };
-