diff --git a/setup.py b/setup.py
index f84aec1..571036c 100644
--- a/setup.py
+++ b/setup.py
@@ -74,5 +74,6 @@
         'Intended Audience :: Developers',
         "Operating System :: OS Independent",
         'Topic :: Software Development :: Libraries :: Python Modules',
+        'Programming Language :: Cython',
     ],
 )