diff --git a/gluon.d.ts b/gluon.d.ts
index dcee202..cf3bb6f 100644
--- a/gluon.d.ts
+++ b/gluon.d.ts
@@ -97,7 +97,10 @@ type Window = {
    * API for Gluon idle management (like hibernation).
    * @experimental
    */
-  idle: IdleApi
+  idle: IdleApi,
+
+  /** Close the Gluon window. */
+  close(): void
 };