diff --git a/webpack.config.ts b/webpack.config.ts
index b60ac50..98f6aab 100644
--- a/webpack.config.ts
+++ b/webpack.config.ts
@@ -122,7 +122,10 @@ const config: Configuration = {
   },
   entry: getScriptsEntryObject(),
   resolve: {
-    extensions: [".ts", ".js"],
+    extensions: [".ts", ".js", ".mjs"],
+    // Explicitly define where node_modules is in this project for corejs imports
+    // See: https://stackoverflow.com/a/62129649
+    modules: [path.resolve(__dirname, "node_modules")],
   },
   output: {
     filename: "[name].js",