diff --git a/setup.py b/setup.py
index 07944c9..232b42c 100755
--- a/setup.py
+++ b/setup.py
@@ -13,6 +13,7 @@ setup(name='authentic2-idp-ltpa',
         packages=find_packages(os.path.dirname(__file__) or '.'),
         install_requires=[
             'pyDes',
+            'authentic2',
         ],
         entry_points={
             'authentic2.plugin': [