diff --git a/webpack.config.js b/webpack.config.js
index 67caec60e92..e3eb57abcf2 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -25,6 +25,9 @@ const htmlWebpackPluginCommon = {
     APP_NAME
 };
 
+// Change this number to bypass all old HTTP caches
+const CACHE_EPOCH = 2;
+
 const base = {
     mode: process.env.NODE_ENV === 'production' ? 'production' : 'development',
     devtool: process.env.SOURCEMAP || (process.env.NODE_ENV === 'production' ? false : 'cheap-module-source-map'),
@@ -47,8 +50,8 @@ const base = {
     },
     output: {
         library: 'GUI',
-        filename: process.env.NODE_ENV === 'production' ? 'js/[name].[contenthash].js' : 'js/[name].js',
-        chunkFilename: process.env.NODE_ENV === 'production' ? 'js/[name].[contenthash].js' : 'js/[name].js',
+        filename: process.env.NODE_ENV === 'production' ? `js-${CACHE_EPOCH}/[name].[contenthash].js` : 'js/[name].js',
+        chunkFilename: process.env.NODE_ENV === 'production' ? `js-${CACHE_EPOCH}/[name].[contenthash].js` : 'js/[name].js',
         publicPath: root
     },
     resolve: {