diff --git a/src/index.ts b/src/index.ts
index 98331fa..968a8c1 100755
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,3 +1,4 @@
+#!/usr/bin/env node
 /**
  * This script reads a TypeScript file and verifies that it produces the expected types and errors.
  *