diff --git a/MANIFEST.in b/MANIFEST.in
index 7043e37c..c95924a3 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1 +1 @@
-include README.rst LICENSE CODE_OF_CONDUCT.md CONTRIBUTING.md requirements.txt docs/source/*.rst
+include README.rst LICENSE CODE_OF_CONDUCT.md CONTRIBUTING.md requirements.txt docs/source/*.rst libcst/py.typed
diff --git a/libcst/py.typed b/libcst/py.typed
new file mode 100644
index 00000000..e69de29b
diff --git a/setup.py b/setup.py
index b222468c..1dfe7ae5 100644
--- a/setup.py
+++ b/setup.py
@@ -22,6 +22,7 @@ setuptools.setup(
     url="https://github.com/Instagram/LibCST",
     license="MIT",
     packages=setuptools.find_packages(),
+    package_data={"libcst": ["py.typed"]},
     test_suite="libcst",
     python_requires=">=3.6",
     install_requires=[
@@ -51,4 +52,5 @@ setuptools.setup(
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
     ],
+    zip_safe=False,  # for mypy compatibility https://mypy.readthedocs.io/en/latest/installed_packages.html
 )