diff --git a/src/build/browser.js b/src/build/browser.js
index <HASH>..<HASH> 100644
--- a/src/build/browser.js
+++ b/src/build/browser.js
@@ -39,8 +39,8 @@ function minify (ctx, task) {
   return fs.readFile(path.join(process.cwd(), 'dist', 'index.js'))
     .then((code) => {
       const result = Uglify.minify(code.toString(), {
-        mangle: false,
-        compress: false
+        mangle: true,
+        compress: { unused: false }
       })
       if (result.error) {
         throw result.error
feat: enable uglify mangle and compress