diff --git a/gulpfile.babel.js b/gulpfile.babel.js
index cab91be5b..d3475b034 100644
--- a/gulpfile.babel.js
+++ b/gulpfile.babel.js
@@ -105,7 +105,7 @@ const webpack = {
         {
           test: /.js$/,
           loader: 'babel-loader',
-          exclude: /node_modules(?!\/foundation-sites)/,
+          exclude: /node_modules(?![\\\/]foundation-sites)/,
         },
       ],
     },
@@ -118,7 +118,7 @@ const webpack = {
     log('[webpack]', stats.toString({
       colors: true,
     }));
-    
+
     browser.reload();
   },