diff --git a/demo/index.html b/demo/index.html
index e55e5cc..4679125 100644
--- a/demo/index.html
+++ b/demo/index.html
@@ -19,14 +19,14 @@
     <h1>Folk Canvas Primitives</h1>
 
     <ul>
-      <li><a href="shapes">Shapes</a></li>
-      <li><a href="collision">Collision</a></li>
-      <li><a href="maps">Maps</a></li>
-      <li><a href="music">Music</a></li>
-      <li><a href="ink">Ink</a></li>
-      <li><a href="arrows">Arrows</a></li>
-      <li><a href="canvasify">Canvasify</a></li>
-      <li><a href="spreadsheet">Spreadsheet</a></li>
+      <li><a href="shapes.html">Shapes</a></li>
+      <li><a href="collision.html">Collision</a></li>
+      <li><a href="maps.html">Maps</a></li>
+      <li><a href="music.html">Music</a></li>
+      <li><a href="ink.html">Ink</a></li>
+      <li><a href="arrows.html">Arrows</a></li>
+      <li><a href="canvasify.html">Canvasify</a></li>
+      <li><a href="spreadsheet.html">Spreadsheet</a></li>
       <li><a href="chains-of-thought/index.html">Chains of thought</a></li>
     </ul>
   </body>