diff --git a/pyproject.toml b/pyproject.toml
index 3b99117..37c4295 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -49,7 +49,7 @@ dev = [
     "pytest-cov==7.0.0",
     "ruff==0.14.10",
     "tox==4.32.0",
-    "ty==0.0.8",
+    "ty==0.0.9",
 ]
 docs = [
     "mkdocs>=1.6,<2",