diff --git a/.travis.yml b/.travis.yml
index 936ffc979..9e5e11d77 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,6 +16,7 @@ addons:
       - build-essential
       - git
       - python-six
+      - python-six.moves
       - python-virtualenv
       - inkscape
       - python-dev