diff --git a/index.ts b/index.ts
index 3629502..05553c7 100644
--- a/index.ts
+++ b/index.ts
@@ -1,3 +1,4 @@
+#!/usr/bin/env node
 /*
  * Copyright Elasticsearch B.V. and contributors
  * SPDX-License-Identifier: Apache-2.0