diff --git a/examples/viewer/index.html b/examples/viewer/index.html
index 6f6cf4e..5cc93da 100644
--- a/examples/viewer/index.html
+++ b/examples/viewer/index.html
@@ -178,6 +178,7 @@
     {
       "imports": {
         "three": "/examples/js/vendor/three/build/three.module.js",
+        "three/addons/": "/examples/js/vendor/three/examples/jsm/",
         "@forge-gfx/forge": "/dist/forge.module.js"
       }
     }