diff --git a/ion/src/emscripten/simulator.html b/ion/src/emscripten/simulator.html
index 57d87ef8d..dde8a5b09 100644
--- a/ion/src/emscripten/simulator.html
+++ b/ion/src/emscripten/simulator.html
@@ -292,5 +292,6 @@ window.addEventListener("keydown", function(e) {
   }
 }, false);
     </script>
+    <script async src="https://www.numworks.com/simulator/update.js"></script>
   </body>
 </html>