diff --git a/src/content/docs/en/reference/cli-reference.mdx b/src/content/docs/en/reference/cli-reference.mdx
index 1569152fc527b..d141e5a8e1b99 100644
--- a/src/content/docs/en/reference/cli-reference.mdx
+++ b/src/content/docs/en/reference/cli-reference.mdx
@@ -376,6 +376,16 @@ astro telemetry reset
 Add the `astro telemetry disable` command to your CI scripts or set the `ASTRO_TELEMETRY_DISABLED` environment variable.
 :::
 
+## `astro create-key`
+
+Generates a key to encrypt props passed to server islands.
+
+```shell
+astro create-key
+```
+
+Set this key as the `ASTRO_KEY` environment variable (e.g. in a `.env` file) and include it in your CI/CD or host’s build settings when you need [a constant encryption key for your server islands](/en/guides/server-islands/#reusing-the-encryption-key) for situations like rolling deployments, multi-region hosting or a CDN that caches pages containing server islands.
+
 ## Common flags
 
 ### `--root <path>`