diff --git a/README.md b/README.md
index 6c23e97..18085e0 100644
--- a/README.md
+++ b/README.md
@@ -795,6 +795,8 @@ Projects I've inspected for drag & drop architecture:
 
 ### 10/2020
 
+- Refactored for `dataset` [#2](https://github.com/morris/vanilla-todo/issues/2) —
+  [@opethrocks](https://github.com/opethrocks)
 - Fixed [#3](https://github.com/morris/vanilla-todo/issues/3) (navigation bug) —
   [@anchepiece](https://github.com/anchepiece),
   [@jcoussard](https://github.com/jcoussard)
diff --git a/public/index.html b/public/index.html
index fadb84c..2a8b4d3 100644
--- a/public/index.html
+++ b/public/index.html
@@ -26,7 +26,7 @@
 
     <script
       nomodule
-      src="https://polyfill.io/v3/polyfill.min.js?features=Set%2CMap%2CObject.assign%2Cfetch%2CrequestAnimationFrame%2CNodeList.prototype.forEach%2CElement.prototype.classList%2Cperformance.now%2cNode.prototype.contains"
+      src="https://polyfill.io/v3/polyfill.min.js?features=Set%2CMap%2CObject.assign%2Cfetch%2CrequestAnimationFrame%2CNodeList.prototype.forEach%2CElement.prototype.classList%2Cperformance.now%2CNode.prototype.contains%2CElement.prototype.dataset"
     ></script>
     <script src="scripts/AppCollapsible.js"></script>
     <script src="scripts/AppDraggable.js"></script>