diff --git a/.travis.yml b/.travis.yml
index 525ac87..557c203 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,9 +3,13 @@ python:
   - 3.6
   - 3.5
   - 3.4
-  - 3.3
   - 2.7
   - pypy
+matrix:
+  include:
+    - python: 3.7
+      dist: xenial
+      sudo: required
 install:
   - pip install -r requirements.txt
   - pip install coveralls
diff --git a/setup.py b/setup.py
index 123bf23..e5db694 100644
--- a/setup.py
+++ b/setup.py
@@ -25,10 +25,10 @@
         'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        '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',
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: PyPy',
     ],
diff --git a/tox.ini b/tox.ini
index e85c89c..3241017 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,10 +1,10 @@
 [tox]
-envlist = py27, py32, py33, py34, py35, py36, pypy
+envlist = py27, py34, py35, py36, py37, pypy
 
 [testenv]
 commands = {envpython} setup.py test
 deps =
-  six==1.9.0
+  six==1.11.0
 
 [testenv:benchmarks]
 deps =