diff --git a/setup.py b/setup.py
index 95c0faa2..1081089f 100644
--- a/setup.py
+++ b/setup.py
@@ -80,7 +80,15 @@ if __name__ == "__main__":
               'Intended Audience :: Developers',
               'Intended Audience :: Science/Research',
               'License :: OSI Approved :: BSD License',
-              'Topic :: Scientific/Engineering'],
+              'Programming Language :: C',
+              'Programming Language :: Python',
+              'Programming Language :: Python :: 3',
+              'Topic :: Scientific/Engineering',
+              'Operating System :: Microsoft :: Windows',
+              'Operating System :: POSIX',
+              'Operating System :: Unix',
+              'Operating System :: MacOS',
+              ],
 
         configuration=configuration,
         install_requires=[],