diff --git a/setup.cfg b/setup.cfg
index b8d1800..bf96907 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -22,8 +22,8 @@ classifier =
     Programming Language :: Python :: 3 :: Only
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.6
-    Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
     Topic :: Internet :: WWW/HTTP
 keywords =
     horizon