diff --git a/.travis.yml b/.travis.yml
index 78c391ed..985ce7ae 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,9 @@
 language: python
 python:
   - "2.7"
+  - "3.3"
 install:
-  - pip install mock iso8601 backports.ssl-match-hostname --use-mirrors
+  - pip install six mock iso8601 backports.ssl-match-hostname --use-mirrors
   - python setup.py install
 script:
   - python -m unittest discover -s tests