diff --git a/setup.cfg b/setup.cfg
index b948fea..b5f294a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -14,6 +14,7 @@ license = MIT License
 classifiers =
     Development Status :: 5 - Production/Stable
     Environment :: Console
+    Framework :: Sphinx :: Extension
     Intended Audience :: Developers
     Intended Audience :: Information Technology
     License :: OSI Approved :: MIT License