diff --git a/annofabapi/py.typed b/annofabapi/py.typed
new file mode 100644
index 00000000..e69de29b
diff --git a/setup.py b/setup.py
index 4a7ad69f..1dc78f35 100644
--- a/setup.py
+++ b/setup.py
@@ -43,5 +43,8 @@
         "Topic :: Utilities",
         "Operating System :: OS Independent",
     ],
-    packages=find_packages(exclude=["tests"])
+    packages=find_packages(exclude=["tests"]),
+    package_data={
+        "annofabapi": ["py.typed"]
+    }
 )