diff --git a/scripts/webpack/webpack-calling.prod.babel.js b/scripts/webpack/webpack-calling.prod.babel.js
index aed9420c9..86384f9a1 100644
--- a/scripts/webpack/webpack-calling.prod.babel.js
+++ b/scripts/webpack/webpack-calling.prod.babel.js
@@ -50,7 +50,7 @@ if (fs.existsSync('./src/index.html')) {
   );
 }
 
-const publicPath = process.env.BUILD_PUBLIC_PATH;
+const publicPath = process.env.BUILD_PUBLIC_PATH || '/';
 
 // env config object from command line: https://webpack.js.org/guides/environment-variables/
 module.exports = (env) => webpackBaseConfig({
diff --git a/scripts/webpack/webpack.prod.babel.js b/scripts/webpack/webpack.prod.babel.js
index 1858d4c22..96fc4efdb 100644
--- a/scripts/webpack/webpack.prod.babel.js
+++ b/scripts/webpack/webpack.prod.babel.js
@@ -49,7 +49,7 @@ if (fs.existsSync('./src/index.html')) {
   );
 }
 
-const publicPath = process.env.BUILD_PUBLIC_PATH;
+const publicPath = process.env.BUILD_PUBLIC_PATH || '/';
 
 // env config object from command line: https://webpack.js.org/guides/environment-variables/
 module.exports = (env) => webpackBaseConfig({