diff --git a/js-packages/webpack-config/index.js b/js-packages/webpack-config/index.js
index ea568fd27..969254dfe 100644
--- a/js-packages/webpack-config/index.js
+++ b/js-packages/webpack-config/index.js
@@ -50,9 +50,9 @@ module.exports = function(options = {}) {
 
     externals: [
       {
-        '@flarum/core/forum': 'flarum',
-        '@flarum/core/admin': 'flarum',
-        'jquery': 'jQuery'
+        '@flarum/core/forum': 'flarum.core',
+        '@flarum/core/admin': 'flarum.core',
+        'jquery': 'jQuery',
       },
 
       // Support importing old-style core modules.