diff --git a/pyproject.toml b/pyproject.toml
index 3a95cca..6db8d86 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,6 +27,7 @@ dev = [
   "mesa_frames[pandas,polars]",
   "pytest",
   "pytest-cov",
+  "typeguard",
 ]
 
 [tool.hatch.build.targets.wheel]