diff --git a/web/webpack.config.js b/web/webpack.config.js
index 8f41c12e..8382b921 100644
--- a/web/webpack.config.js
+++ b/web/webpack.config.js
@@ -124,6 +124,7 @@ module.exports = {
 if (NODE_ENV === 'production') {
   module.exports.plugins.push(
     new webpack.optimize.UglifyJsPlugin({
+      exclude: "sprite.js",
       compress: {
         warnings: false,
         drop_console: true,