diff --git a/setup.py b/setup.py
index 805e9cb943..fcfac67618 100644
--- a/setup.py
+++ b/setup.py
@@ -65,6 +65,7 @@ setup(name='trytond_party',
         'Natural Language :: French',
         'Natural Language :: German',
         'Natural Language :: Russian',
+        'Natural Language :: Slovenian',
         'Natural Language :: Spanish',
         'Operating System :: OS Independent',
         'Programming Language :: Python :: 2.6',