diff --git a/ruff.toml b/ruff.toml
index 01873dab..b928ad00 100644
--- a/ruff.toml
+++ b/ruff.toml
@@ -35,7 +35,7 @@ exclude = [
 line-length = 88
 indent-width = 4
 
-# Assume Python 3.9
+# !XXX sync with `pyproject.toml`!
 target-version = "py312"
 
 # ------ - ------