diff --git a/openhtf/py.typed b/openhtf/py.typed
new file mode 100644
index 00000000..e69de29b
diff --git a/pyproject.toml b/pyproject.toml
index 4fd11c67..bbfcf1f1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,11 +45,13 @@ find = {}
 
 [tool.setuptools.package-data]
 openhtf = [
+    "py.typed",
     "output/web_gui/dist/*.*",
     "output/web_gui/dist/css/*",
     "output/web_gui/dist/js/*",
     "output/web_gui/dist/img/*",
     "output/web_gui/*.*",
+
 ]
 
 [tool.setuptools-protobuf]