diff --git a/lib/ListExtender.js b/lib/ListExtender.js
index 3f2d7a8..f37cbf4 100644
--- a/lib/ListExtender.js
+++ b/lib/ListExtender.js
@@ -233,6 +233,9 @@
       if (canRemove(input.target, thing) && thing.listSize > 1) {
         thing.element.removeChild(input.target.parentElement);
         thing.listSize--;
+        thing.element.childNodes.forEach((e, index) => {
+          e.setAttribute("key", index + 1);
+        });
       } else if (validate(input.target) && customChecks(input.target, thing)) {
         turnToList(input.target, thing);
       }