diff --git a/js/src/embed.js b/js/src/embed.js
deleted file mode 100644
index 0baad282..00000000
--- a/js/src/embed.js
+++ /dev/null
@@ -1,9 +0,0 @@
-// Entry point for the unpkg bundle containing custom model definitions.
-//
-// It differs from the notebook bundle in that it does not need to define a
-// dynamic baseURL for the static assets and may load some css that would
-// already be loaded by the notebook otherwise.
-
-// Export widget models and views, and the npm package version number.
-module.exports = require('./mpl_widget.js');
-module.exports['version'] = require('../package.json').version;
diff --git a/js/src/index.js b/js/src/index.js
index ab627aec..80b54eb7 100644
--- a/js/src/index.js
+++ b/js/src/index.js
@@ -1,6 +1,4 @@
-
 // Export widget models and views, and the npm package version number.
 export * from './toolbar_widget.js';
 export * from './mpl_widget.js';
 export { version } from '../package.json';
-
diff --git a/js/webpack.config.js b/js/webpack.config.js
index da2e7c67..735ee87a 100644
--- a/js/webpack.config.js
+++ b/js/webpack.config.js
@@ -63,7 +63,7 @@ module.exports = [
      // The target bundle is always `dist/index.js`, which is the path required
      // by the custom widget embedder.
      //
-        entry: './src/embed.js',
+        entry: './src/index.js',
         output: {
             filename: 'index.js',
             path: path.resolve(__dirname, 'dist'),