diff --git a/setup.py b/setup.py
index 82f6e276..6ae77d4b 100644
--- a/setup.py
+++ b/setup.py
@@ -35,7 +35,7 @@
     maintainer_email='aleneum@gmail.com',
     url='http://github.com/pytransitions/transitions',
     packages=find_packages(exclude=['tests', 'test_*']),
-    package_data={'transitions': ['data/*'],
+    package_data={'transitions': ['py.typed', 'data/*'],
                   'transitions.tests': ['data/*']
                   },
     include_package_data=True,
diff --git a/transitions/py.typed b/transitions/py.typed
new file mode 100644
index 00000000..8b137891
--- /dev/null
+++ b/transitions/py.typed
@@ -0,0 +1 @@
+