diff --git a/demo/index.html b/demo/index.html
index 7f1063eb2..c0aaf6c5c 100644
--- a/demo/index.html
+++ b/demo/index.html
@@ -23,6 +23,16 @@
 			}
 			#info a, .button { color: #f00; font-weight: bold; text-decoration: underline; cursor: pointer }
 		</style>
+
+		<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
+		<script type="importmap">
+			{
+				"imports": {
+					"three": "https://unpkg.com/three@0.154.0/build/three.module.js",
+					"three-examples/": "https://unpkg.com/three@0.154.0/examples/jsm/"
+				}
+			}
+		</script>
 	</head>
 
 	<body>
@@ -31,8 +41,8 @@
 		</div>
 
 		<script type="module">
-			import * as THREE from 'https://unpkg.com/three@0.122.0/build/three.module.js';
-			import { GLTFLoader } from 'https://unpkg.com/three@0.122.0/examples/jsm/loaders/GLTFLoader.js';
+			import * as THREE from 'three';
+			import { GLTFLoader } from 'three-examples/loaders/GLTFLoader.js';
 			import { MeshoptDecoder } from '../js/meshopt_decoder.module.js';
 
 			var container;
diff --git a/demo/simplify.html b/demo/simplify.html
index cc4a575b2..75723b439 100644
--- a/demo/simplify.html
+++ b/demo/simplify.html
@@ -23,6 +23,16 @@
 			}
 			#info a, .button { color: #f00; font-weight: bold; text-decoration: underline; cursor: pointer }
 		</style>
+
+		<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
+		<script type="importmap">
+			{
+				"imports": {
+					"three": "https://unpkg.com/three@0.154.0/build/three.module.js",
+					"three-examples/": "https://unpkg.com/three@0.154.0/examples/jsm/"
+				}
+			}
+		</script>
 	</head>
 
 	<body>
@@ -31,9 +41,9 @@
 		</div>
 
 		<script type="module">
-			import * as THREE from 'https://unpkg.com/three@0.122.0/build/three.module.js';
-			import { GLTFLoader } from 'https://unpkg.com/three@0.122.0/examples/jsm/loaders/GLTFLoader.js';
-			import { OrbitControls } from 'https://unpkg.com/three@0.122.0/examples/jsm/controls/OrbitControls.js';
+			import * as THREE from 'three';
+			import { GLTFLoader } from 'three-examples/loaders/GLTFLoader.js';
+			import { OrbitControls } from 'three-examples/controls/OrbitControls.js';
 			import { MeshoptDecoder } from '../js/meshopt_decoder.module.js';
 			import { MeshoptSimplifier } from '../js/meshopt_simplifier.module.js';
 			import { GUI } from 'https://unpkg.com/lil-gui@0.17.0/dist/lil-gui.esm.js';
