diff --git a/scripts/webpack/webpack.prod.js b/scripts/webpack/webpack.prod.js
index c014f8b54d9..cc7882dbe05 100644
--- a/scripts/webpack/webpack.prod.js
+++ b/scripts/webpack/webpack.prod.js
@@ -86,6 +86,21 @@ module.exports = (env = {}) =>
         integrity: true,
         integrityHashes: ['sha384', 'sha512'],
         publicPath: true,
+        // This transform filters down the assets to only include the ones that are part of the entrypoints
+        // this is all that the backend requires.
+        transform(assets, manifest) {
+          const entrypointAssets = Object.values(assets[manifest.options.entrypointsKey]).flatMap((entry) => [
+            ...(entry.assets.js || []),
+            ...(entry.assets.css || []),
+          ]);
+          const filteredAssets = Object.entries(assets).filter(([assetFileName]) =>
+            entrypointAssets.includes(assets[assetFileName].src)
+          );
+          const result = Object.fromEntries(filteredAssets);
+          result[manifest.options.entrypointsKey] = assets[manifest.options.entrypointsKey];
+
+          return result;
+        },
       }),
       new WebpackManifestPlugin({
         fileName: path.join(process.cwd(), 'manifest.json'),