diff --git a/babel.config.js b/babel.config.js
index b5ac4e77..d0d23f47 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -53,6 +53,12 @@ module.exports = function(api) {
           loose: true
         }
       ],
+      [
+        '@babel/plugin-proposal-private-property-in-object',
+        {
+          loose: true
+        }
+      ],
       [
         '@babel/plugin-proposal-object-rest-spread',
         {