diff --git a/index.d.ts b/index.d.ts
index 1e950d5..13e2728 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -7,4 +7,7 @@ declare global {
   interface Window {
     TaskListsElement: typeof TaskListsElement
   }
-}
+  interface HTMLElementTagNameMap {
+    'task-lists': TaskListsElement
+  }
+}
\ No newline at end of file