diff --git a/pyproject.toml b/pyproject.toml
index 03c3dea..a6a16bd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,6 +16,7 @@ dependencies = [
 dev = [
     "ruff",
     "pytest",
+    "ty",
 ]
 
 [build-system]