diff --git a/setup.py b/setup.py
index 34368c94f0..4fbfec2550 100644
--- a/setup.py
+++ b/setup.py
@@ -40,6 +40,7 @@ setup(name='trytond_purchase',
     classifiers=[
         'Development Status :: 5 - Production/Stable',
         'Environment :: Plugins',
+        'Framework :: Tryton',
         'Intended Audience :: Developers',
         'Intended Audience :: Financial and Insurance Industry',
         'Intended Audience :: Legal Industry',