diff --git a/README.md b/README.md
index f3938a3..3fc5942 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,7 @@ A Claude Code plugin that gives Claude a reference for the `tea` CLI and enforce
 ## Prerequisites
 
 - **Claude Code** — CLI, desktop app, or IDE extension
+- **Python 3** — required by the `tea-guard` hook (`python3` must be on `$PATH`)
 - **`tea`** — Gitea's official CLI. Install with `brew install tea` (macOS) or from [gitea.com/gitea/tea/releases](https://gitea.com/gitea/tea/releases)
 - At least one login configured: `tea logins add` (interactive — run it in a terminal, not via Claude)