diff --git a/public/admin.html b/public/admin.html
index fb64245..1d9c6c7 100644
--- a/public/admin.html
+++ b/public/admin.html
@@ -161,6 +161,17 @@
 
   <div id="toast"></div>
 
-  <script type="module" src="js/admin.js?v=1"></script>
+  <!-- Import map so OrbitControls' bare `from 'three'` resolves.
+       Without this the module import fails and the editor never boots. -->
+  <script type="importmap">
+  {
+    "imports": {
+      "three": "https://cdn.jsdelivr.net/npm/three@0.160.0/build/three.module.js",
+      "three/addons/": "https://cdn.jsdelivr.net/npm/three@0.160.0/examples/jsm/"
+    }
+  }
+  </script>
+
+  <script type="module" src="js/admin.js?v=2"></script>
 </body>
 </html>
diff --git a/public/ar-head.html b/public/ar-head.html
index 2b4aced..baf8604 100644
--- a/public/ar-head.html
+++ b/public/ar-head.html
@@ -78,6 +78,14 @@
   <script src="vendor/posit1.js"></script>
   <script src="vendor/aruco.js"></script>
   <script src="vendor/dictionaries/aruco_4x4_1000.js"></script>
+  <script type="importmap">
+  {
+    "imports": {
+      "three": "https://cdn.jsdelivr.net/npm/three@0.160.0/build/three.module.js",
+      "three/addons/": "https://cdn.jsdelivr.net/npm/three@0.160.0/examples/jsm/"
+    }
+  }
+  </script>
   <script type="module" src="js/ar-head.js"></script>
 </body>
 </html>
diff --git a/public/index.html b/public/index.html
index bbe502d..cd72821 100644
--- a/public/index.html
+++ b/public/index.html
@@ -25,6 +25,14 @@
     <div class="row">link: <span id="status" class="warn">connecting…</span> · ghosts: <b id="count">0</b></div>
     <div class="row">drag to orbit · scroll to zoom</div>
   </div>
+  <script type="importmap">
+  {
+    "imports": {
+      "three": "https://cdn.jsdelivr.net/npm/three@0.160.0/build/three.module.js",
+      "three/addons/": "https://cdn.jsdelivr.net/npm/three@0.160.0/examples/jsm/"
+    }
+  }
+  </script>
   <script type="module" src="js/viewer.js"></script>
 </body>
 </html>
diff --git a/public/js/admin.js b/public/js/admin.js
index 01d0216..f7c747a 100644
--- a/public/js/admin.js
+++ b/public/js/admin.js
@@ -8,8 +8,8 @@
  * Coordinates: world millimetres, origin at the front-left table corner.
  * X = length (1500), Z = depth (700), Y = height. Three.js uses metres (×0.001).
  */
-import * as THREE from 'https://cdn.jsdelivr.net/npm/three@0.160.0/build/three.module.js';
-import { OrbitControls } from 'https://cdn.jsdelivr.net/npm/three@0.160.0/examples/jsm/controls/OrbitControls.js';
+import * as THREE from 'three';
+import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
 
 const MM = 0.001;
 const LURE = {
diff --git a/public/js/ar-head.js b/public/js/ar-head.js
index 84d2049..f3d56df 100644
--- a/public/js/ar-head.js
+++ b/public/js/ar-head.js
@@ -7,7 +7,7 @@
  *
  * This is the real-3D successor to ar-test.js (which was a flat sprite).
  */
-import * as THREE from 'https://cdn.jsdelivr.net/npm/three@0.160.0/build/three.module.js';
+import * as THREE from 'three';
 import { buildLegoHeadGhost } from './lego-head-ghost.js?v=1';
 import { TunedDetector, MarkerTracker } from './detect-tuned.js?v=1';
 
diff --git a/public/js/viewer.js b/public/js/viewer.js
index 35620b5..e044f64 100644
--- a/public/js/viewer.js
+++ b/public/js/viewer.js
@@ -1,5 +1,5 @@
-import * as THREE from 'https://cdn.jsdelivr.net/npm/three@0.160.0/build/three.module.js';
-import { OrbitControls } from 'https://cdn.jsdelivr.net/npm/three@0.160.0/examples/jsm/controls/OrbitControls.js';
+import * as THREE from 'three';
+import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
 
 // ---- Config --------------------------------------------------------------
 const MM = 0.001; // millimetre -> Three.js metre scale