diff --git a/.core/umd.webpack.config.js b/.core/umd.webpack.config.js
index d26e6dbc..1a302104 100644
--- a/.core/umd.webpack.config.js
+++ b/.core/umd.webpack.config.js
@@ -18,7 +18,7 @@ const overrides = (umd, config) => {
         ])
         .forEach(file => {
             try {
-                require(path.resolve(file))(umd, config);
+                config = require(path.resolve(file))(umd, config);
             } catch (error) {
                 console.error(chalk.red(`Error loading ${file}:`));
                 console.error(error);
diff --git a/.core/webpack.config.js b/.core/webpack.config.js
index c5bc9e12..b26ebc79 100644
--- a/.core/webpack.config.js
+++ b/.core/webpack.config.js
@@ -27,7 +27,7 @@ const overrides = config => {
         ])
         .forEach(file => {
             try {
-                require(path.resolve(file))(config);
+                config = require(path.resolve(file))(config);
             } catch (error) {
                 console.error(chalk.red(`Error loading ${file}:`));
                 console.error(error);