diff --git a/node_modules/metro-bundler/src/JSTransformer/worker/minify.js b/node_modules/metro-bundler/src/JSTransformer/worker/minify.js
index f2663e1..b7410cb 100644
--- a/node_modules/metro-bundler/src/JSTransformer/worker/minify.js
+++ b/node_modules/metro-bundler/src/JSTransformer/worker/minify.js
@@ -38,7 +38,7 @@ filename)
 
 function minify(inputCode, inputMap) {
   const result = uglify.minify(inputCode, {
-    mangle: false,
+    mangle: { toplevel: true },
     output: {
       ascii_only: true,
       quote_style: 3,
@@ -63,4 +63,4 @@ function minify(inputCode, inputMap) {
 
 module.exports = {
   noSourceMap,
-  withSourceMap };
+  withSourceMap };
\ No newline at end of file