diff --git a/pyproject.toml b/pyproject.toml
index e8a96aed..47c4fb57 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -48,7 +48,7 @@ dev = [
     # floating version reddens unrelated PRs on someone else's release schedule
     # (0.0.69/0.0.70 added unsound-return-statement and unsound-yield, 35 errors
     # against an unchanged tree). Bump deliberately, with the new rules addressed.
-    "ty==0.0.69",
+    "ty==0.0.72",
     "tqdm",
     "twine",
 ]