diff --git a/examples/index.html b/examples/index.html
index 94e8ff1..62e203c 100644
--- a/examples/index.html
+++ b/examples/index.html
@@ -5,8 +5,8 @@
   <meta charset="UTF-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
   <title>CesiumPlot</title>
-  <script src="https://cesium.com/downloads/cesiumjs/releases/1.99/Build/Cesium/Cesium.js"></script>
-  <link href="https://cesium.com/downloads/cesiumjs/releases/1.99/Build/Cesium/Widgets/widgets.css" rel="stylesheet">
+  <script src="https://cdn.bootcdn.net/ajax/libs/cesium/1.99.0/Cesium.js"></script>
+  <link href="https://cdn.bootcdn.net/ajax/libs/cesium/1.99.0/Build/Cesium/Widgets/widgets.css" rel="stylesheet">
   <style>
     /* @import url(/node_modules/cesium/Source/Widgets/widgets.css); */