diff --git a/pyproject.toml b/pyproject.toml
index 03d8d502..2917a277 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -79,7 +79,7 @@ optional-dependencies.dev = [
     "sphinxcontrib-towncrier==0.5.0a0",
     "strict-kwargs==2026.5.20",
     "towncrier==25.8.0",
-    "ty==0.0.38",
+    "ty==0.0.40",
     "types-pyyaml==6.0.12.20260518",
     "vulture==2.16",
     "yamlfix==1.19.1",