diff --git a/README.md b/README.md
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@@ -3,6 +3,6 @@
 The clock for a GitHub-native agent factory: GitHub is the ledger, GitHub-hosted runners are Time, chat is where you plan.
 
 - **Mentions** (`mention.yml`): write `@kimi`, `@grok 4.7`, `@qwen max high` in an issue, PR or comment and that seat replies in the thread. Seats and aliases: `.github/time/seats.json`.
-- **Heartbeat** (`heartbeat.yml`): every 15 minutes, open issues labelled `ready` get picked up. An issue needs a `DONE:` line (what finished means, e.g. `DONE: send to @review`). Dry-run until the repo variable `TIME_MODE` is `live`; at most `TIME_DAILY_CAP` (default 5) dispatches a day.
+- **Heartbeat** (`heartbeat.yml`): every hour, open issues labelled `ready` get picked up. An issue needs a `DONE:` line (what finished means, e.g. `DONE: send to @review`). Dry-run until the repo variable `TIME_MODE` is `live`; at most `TIME_DAILY_CAP` (default 5) dispatches a day.
 
 Brains run on Venice (`VENICE_API_KEY` repo secret). Comments Time posts never trigger another run.