diff --git a/.travis.yml b/.travis.yml
index b33b8c1..e516388 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,9 @@
 language: python
-
+python:
+  - '2.7'
+  - '3.4'
+  - '3.5'
+  - '3.6'
 install:
   - pip install tox coveralls
 script: