diff --git a/pyproject.toml b/pyproject.toml
index e0f4dbe..91ff839 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,6 +25,9 @@ build-backend = "setuptools.build_meta"
 [tool.setuptools.packages.find]
 where = ["src"]
 
+[tool.setuptools.package-data]
+pyhoff = ["py.typed"]
+
 [project.optional-dependencies]
 dev = [
     "pytest", "flake8", "mypy"
diff --git a/src/pyhoff/py.typed b/src/pyhoff/py.typed
new file mode 100644
index 0000000..e69de29