diff --git a/setup.cfg b/setup.cfg
index a945265..239328f 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -19,6 +19,7 @@ license_file = COPYING
 classifiers =
     Development Status :: 5 - Production/Stable
     Environment :: Console
+    Operating System :: OS Independent
     License :: Other/Proprietary License
     Natural Language :: English
     Programming Language :: Python :: 3.6