diff --git a/d2js/js/README.md b/d2js/js/README.md
index bb3166849..76f0132f3 100644
--- a/d2js/js/README.md
+++ b/d2js/js/README.md
@@ -29,6 +29,16 @@ pnpm add @terrastruct/d2
 bun add @terrastruct/d2
 ```
 
+### Nightly
+
+Use the `@nightly` tag to get the version that is built by daily CI on the master branch.
+
+For example,
+
+```bash
+yarn add @terrastruct/d2@nightly
+```
+
 ## Usage
 
 D2.js uses webworkers to call a WASM file.