diff --git a/webpack.config.ts b/webpack.config.ts
index 3b836cc..b60ac50 100644
--- a/webpack.config.ts
+++ b/webpack.config.ts
@@ -12,6 +12,9 @@ interface FindReplacePluginOptions {
   replace: { from: RegExp; to: string }[];
 }
 
+/**
+ * Simple find and replace in assets plugin for Webpack
+ */
 class FindReplacePlugin {
   options: FindReplacePluginOptions;
 
@@ -65,14 +68,12 @@ class FindReplacePlugin {
 }
 
 const babelRule: RuleSetRule = {
-  test: /\.(ts|js)$/,
+  test: /\.(ts|js|mjs)$/,
   // https://webpack.js.org/loaders/babel-loader/#exclude-libraries-that-should-not-be-transpiled
-  exclude: /node_modules/,
-  // exclude: [
-  //   // \\ for Windows, / for macOS and Linux
-  //   /node_modules[\\/]core-js/,
-  //   /node_modules[\\/]webpack[\\/]buildin/,
-  // ],
+  exclude: [
+    // \\ for Windows, / for macOS and Linux
+    /node_modules[\\/]core-js/,
+  ],
   use: {
     loader: "babel-loader",
     options: {
@@ -147,7 +148,7 @@ const config: Configuration = {
          */
         { from: /\[\^\\s\(\/\]/g, to: "[^\\s(\\/]" },
         { from: /\[\\w\.\/\]/g, to: "[\\w.\\/]" },
-        // [a-z_+-\/]
+        { from: /\[a-z_\+-\/\]/g, to: "[a-z_+-\\/]" },
       ],
     }),
   ],