diff --git a/index.d.ts b/index.d.ts
index fa64e70..4b91a60 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -6,4 +6,7 @@ declare global {
   interface Window {
     DetailsDialogElement: typeof DetailsDialogElement
   }
-}
+  interface HTMLElementTagNameMap {
+    'details-dialog': DetailsDialogElement
+  }
+}
\ No newline at end of file