diff --git a/setup.py b/setup.py
index b8d6a91..f63f437 100644
--- a/setup.py
+++ b/setup.py
@@ -262,7 +262,7 @@ setup(name='spintrum',
       url='http://www.afach.de/',
       author='Samer Afach',
       author_email='samer@afach.de',
-      license='MPL',
+      license='Dual',
       packages=['spintrum'],
       package_data={'spintrum': [lib_file] + recursive_glob("examples")},
       install_requires=['numpy', 'mpmath'],