diff --git a/website/HISTORY.md b/website/HISTORY.md
index dc52bc7ff..38edb9513 100644
--- a/website/HISTORY.md
+++ b/website/HISTORY.md
@@ -11,6 +11,13 @@ cog.out(text)
 
 # Release history
 
+### v0.39.0
+
+- Use `--sonnet` for Claude 3.5 Sonnet, which is the top model on [aider's LLM code editing leaderboard](https://aider.chat/docs/leaderboards/#claude-35-sonnet-takes-the-top-spot).
+- All `AIDER_xxx` environment variables can now be set in `.env` (by @jpshack-at-palomar).
+- Commit messages are no longer prefixed with "aider:". Instead the git author and committer names have "(aider)" added to them.
+- Use `--llm-history-file` to log raw messages sent to the LLM (by @daniel-vainsencher).
+
 ### v0.38.0
 
 - Use `--vim` for [vim keybindings](https://aider.chat/docs/commands.html#vi) in the chat.