diff --git a/src/extensions/core/load3d/LoaderManager.ts b/src/extensions/core/load3d/LoaderManager.ts
index 03002d661..3a4db5a3d 100644
--- a/src/extensions/core/load3d/LoaderManager.ts
+++ b/src/extensions/core/load3d/LoaderManager.ts
@@ -6,7 +6,9 @@ import { MTLLoader } from 'three/examples/jsm/loaders/MTLLoader'
 import { PLYLoader } from 'three/examples/jsm/loaders/PLYLoader'
 import { STLLoader } from 'three/examples/jsm/loaders/STLLoader'
 import { MtlObjBridge, OBJLoader2Parallel } from 'wwobjloader2'
-import OBJLoader2WorkerUrl from 'wwobjloader2/worker?url'
+// Use pre-bundled worker module (has all dependencies included)
+// The unbundled 'wwobjloader2/worker' has ES imports that fail in production builds
+import OBJLoader2WorkerUrl from 'wwobjloader2/bundle/worker/module?url'
 
 import { t } from '@/i18n'
 import { useSettingStore } from '@/platform/settings/settingStore'