diff --git a/frontend/vite.config.js b/frontend/vite.config.js
index 37c59c6..42bb3f9 100644
--- a/frontend/vite.config.js
+++ b/frontend/vite.config.js
@@ -33,15 +33,16 @@ export default defineConfig(({ mode }) => {
             })
         },
         optimizeDeps: {
-        esbuildOptions: {
-            plugins: [
-                NodeGlobalsPolyfillPlugin({
-                    buffer: true
-                }),
-                NodeModulesPolyfillPlugin()
-            ]
-        }
-    },
+            include: ['three', 'three/examples/jsm/loaders/GLTFLoader.js'],
+            esbuildOptions: {
+                plugins: [
+                    NodeGlobalsPolyfillPlugin({
+                        buffer: true
+                    }),
+                    NodeModulesPolyfillPlugin()
+                ]
+            }
+        },
         resolve: {
             alias: {
                 '@': path.resolve(__dirname, './src'),
@@ -50,5 +51,16 @@ export default defineConfig(({ mode }) => {
                 assert: 'assert',
             }
         },
+        build: {
+            rollupOptions: {
+                output: {
+                    // Stelle sicher, dass three nicht externalisiert wird
+                    manualChunks: undefined
+                }
+            },
+            commonjsOptions: {
+                include: [/three/, /node_modules/]
+            }
+        },
     };
 });