diff --git a/.travis.yml b/.travis.yml
index 302ada3..11d1f22 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,5 @@
 language: python
+python: 2.7
 matrix:
   include:
   - env: CACHE_NAME=latest DEPLOY_DOC_FROM_BRANCH=master DEPLOY_DOC_TO_REPOSITORY=mmasdeu/sage_sample