diff --git a/pyproject.toml b/pyproject.toml
index fdbee24..2ddd4b4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -94,7 +94,7 @@ optional-dependencies.develop = [
   "pyproject-fmt<3",
   "ruff==0.16.*",
   "sphinx-autobuild>=2024.10.3",
-  "ty==0.0.65",
+  "ty==0.0.66",
   "validate-pyproject>=0.25,<1",
 ]
 optional-dependencies.docs = [