diff --git a/HISTORY.rst b/HISTORY.rst
index 0b9e4e5c..79ffeac5 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -3,6 +3,11 @@
 History
 -------
 
+4.0.2
+++++++++++++++++++
+
+* Added ``py.typed`` file per PEP 561. Reported by Árni Már Jónsson.
+
 4.0.1 (2020-07-21)
 ++++++++++++++++++
 
diff --git a/geoip2/py.typed b/geoip2/py.typed
new file mode 100644
index 00000000..e69de29b
diff --git a/setup.py b/setup.py
index eb78ec1f..27a2cb56 100644
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,7 @@
     author_email="goschwald@maxmind.com",
     url="http://www.maxmind.com/",
     packages=["geoip2"],
-    package_data={"": ["LICENSE"]},
+    package_data={"": ["LICENSE"], "geoip2": ["py.typed"]},
     package_dir={"geoip2": "geoip2"},
     include_package_data=True,
     python_requires=">=3.6",