diff --git a/setup.py b/setup.py
index caab19d70..f34dc584d 100644
--- a/setup.py
+++ b/setup.py
@@ -43,5 +43,6 @@
     description=description,
     long_description=long_description,
     long_description_content_type="text/markdown",
+    package_data={"tensornetwork": ["py.typed"]},
     packages=find_packages(),
 )
diff --git a/tensornetwork/py.typed b/tensornetwork/py.typed
new file mode 100644
index 000000000..e69de29bb