diff --git a/pyproject.toml b/pyproject.toml
index b9ef963..dea290a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -63,7 +63,7 @@ optional-dependencies.develop = [
   "poethepoet<1",
   "pyproject-fmt<3",
   "ruff<0.16",
-  "ty==0.0.65; python_version>='3.8'",
+  "ty==0.0.66; python_version>='3.8'",
   "validate-pyproject<1",
 ]
 optional-dependencies.release = [