diff --git a/rio_viz/templates/index.html b/rio_viz/templates/index.html
index f04b0cd..17fa9ee 100644
--- a/rio_viz/templates/index.html
+++ b/rio_viz/templates/index.html
@@ -7,8 +7,8 @@
         <script src='https://unpkg.com/maplibre-gl@2.4.0/dist/maplibre-gl.js'></script>
         <link href='https://unpkg.com/maplibre-gl@2.4.0/dist/maplibre-gl.css' rel='stylesheet' />
 
-        <link href='https://api.mapbox.com/mapbox-assembly/v1.5.1/assembly.min.css' rel='stylesheet'>
-        <script async defer src='https://api.mapbox.com/mapbox-assembly/v1.5.1/assembly.js'></script>
+        <link href='https://api.mapbox.com/mapbox-assembly/v0.23.2/assembly.min.css' rel='stylesheet'>
+        <script src='https://api.mapbox.com/mapbox-assembly/v0.23.2/assembly.js'></script>
         <script src="https://d3js.org/d3.v4.js"></script>
         <style>
             body { margin:0; padding:0; width:100%; height:100%;}