diff --git a/mangle.json b/mangle.json
index 8c776e35fa..9f06314f70 100644
--- a/mangle.json
+++ b/mangle.json
@@ -19,7 +19,8 @@
     },
     "compress": {
       "hoist_vars": true,
-      "reduce_funcs": false
+      "reduce_funcs": false,
+      "ecma": 2020
     }
   },
   "props": {