Merge branch 'master' into i3571-CompleteI18nTemplates

1 files changed, 5 insertions, 1 deletions

diff --git a/gulpfile.js b/gulpfile.js
index adfb148a9..dbbb1e4ff 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -408,7 +408,11 @@ function bundleTask(opts) {
       .pipe(gulpif(debug, sourcemaps.init({ loadMaps: true })))
       // Minification
       .pipe(gulpif(opts.isBuild, uglify({
-        mangle: {  reserved: [ 'MetamaskInpageProvider' ] },
+        mangle: { reserved: [ 'MetamaskInpageProvider' ] },
+      })))
+      // Transpile to ES5
+      .pipe(gulpif(opts.isBuild, babel({
+        presets: ['env']
       })))
       // writes .map file
       .pipe(gulpif(debug, sourcemaps.write('./')))