diff --git a/setup.cfg b/setup.cfg
index 69a57f8..115dccf 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -12,8 +12,9 @@ classifier =
     License :: OSI Approved :: Apache Software License
     Operating System :: POSIX :: Linux
     Programming Language :: Python
-    Programming Language :: Python :: 3.3
-    Programming Language :: Python :: 3.4
+    Programming Language :: Python :: 3.5
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
 
 [global]
 setup-hooks =
diff --git a/tox.ini b/tox.ini
index 84381e0..6398c5b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 1.6
-envlist = py33,py34,pep8
+envlist = py37,py36,py35,pep8
 
 [testenv]
 install_command = pip install -U {opts} {packages}