diff --git a/js/grunt/buildRunnable.js b/js/grunt/buildRunnable.js
index 5deea6b57..da079e44a 100644
--- a/js/grunt/buildRunnable.js
+++ b/js/grunt/buildRunnable.js
@@ -90,9 +90,7 @@ module.exports = async function( repo, minifyOptions, instrument, allHTML, brand
     stripAssertions: false,
     stripLogging: false
   } : {
-    minify: true,
-    beautify: true,
-    mangle: false
+    minify: false
   };
 
   const usedModules = webpackResult.usedModules;