diff --git a/setup.cfg b/setup.cfg
index 6960fa2..6054053 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -16,6 +16,8 @@
     Programming Language :: Python
     Programming Language :: Python :: 2
     Programming Language :: Python :: 2.7
+    Programming Language :: Python :: 3
+    Programming Language :: Python :: 3.5
     Topic :: Internet :: Name Service (DNS)
 
 [global]
diff --git a/tox.ini b/tox.ini
index 4d10a0a..196d873 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 2.0
-envlist = py34,py27,flake8
+envlist = py35,py27,flake8
 skipsdist = True
 
 [testenv]