diff --git a/setup.cfg b/setup.cfg
index 3cb9338f2..2edbd692e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -15,6 +15,9 @@ classifier =
     Operating System :: OS Independent
     Programming Language :: Python
     Programming Language :: Python :: 2
+    Programming Language :: Python :: 2.7
+    Programming Language :: Python :: 3
+    Programming Language :: Python :: 3.5
 
 [files]
 packages =