diff --git a/README.md b/README.md
index 402dbd8..306f62f 100644
--- a/README.md
+++ b/README.md
@@ -101,6 +101,10 @@ dist
 
 You can use `--target es5` or `"target": "es5"` in `tsconfig.json` to compile the code down to es5, it's processed by [buble](http://buble.surge.sh/). Some features are NOT supported by this target, namely: `for .. of`.
 
+### Building CLI app
+
+When an entry file like `src/cli.ts` contains hashbang like `#!/bin/env node` tsup will automatically make the outout file executable, so you don't have to run `chmod +x dist/cli.js`.
+
 ### Watch mode
 
 ```bash