diff --git a/README.md b/README.md
index 4496c92..e11108d 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,7 @@ helpful libraries and resources for *building* Node.js CLIs. Not [a list of CLIs
 - [**Ink**](https://github.com/vadimdemedes/ink): Built by Vadim & Sindre. Key Feature: React Components and Yoga Layout.
 - [**Scritch**](https://github.com/jamiebuilds/scritch): Built by Jamie, used at Eventbrite. Key Feature: compose multiple scripts regardless of language into one CLI.
 - [**Yargs**](https://github.com/yargs/yargs): Built by [bcoe](https://github.com/bcoe), used by `webpack-cli`, `mocha`, `react-native`, `nyc`, and 14,343 other modules.
+- [**arg**](https://github.com/zeit/arg): Built by [ZEIT](https://github.com/zeit), used by `now`, `ncc`, `micro`, `serve`, and many others. Key Feature: [tiny](https://packagephobia.now.sh/result?p=arg)
 
 ## Utility Libraries