diff --git a/pyproject.toml b/pyproject.toml
index ff682a7..feb7432 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -72,7 +72,7 @@ optional-dependencies.dev = [
     "sphinx-pyproject==0.3.0",
     "sphinx-substitution-extensions==2026.1.12",
     "sphinxcontrib-spelling==8.0.2",
-    "ty==0.0.20",
+    "ty==0.0.21",
     "types-pyyaml==6.0.12.20250915",
     "vulture==2.15",
     "yamlfix==1.19.1",