diff --git a/sourcetypes/py.typed b/sourcetypes/py.typed
new file mode 100644
index 0000000..e69de29
diff --git a/sourcetypes/setup.py b/sourcetypes/setup.py
index 6c7c473..da10e19 100644
--- a/sourcetypes/setup.py
+++ b/sourcetypes/setup.py
@@ -14,6 +14,7 @@
     long_description_content_type="text/markdown",
     url="https://github.com/samwillis/python-inline-source/sourcetypes",
     py_modules=['sourcetypes'],
+    package_data={'sourcetypes': ['py.typed']},
     classifiers=[
         "Programming Language :: Python :: 3",
         "License :: OSI Approved :: MIT License",