diff --git a/index.d.ts b/index.d.ts
index 0eb974b..1e950d5 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -2,3 +2,9 @@ export default class TaskListsElement extends HTMLElement {
   disabled: boolean
   sortable: boolean
 }
+
+declare global {
+  interface Window {
+    TaskListsElement: typeof TaskListsElement
+  }
+}