diff --git a/.travis.yml b/.travis.yml
index bbd1337..c9fc7d5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,7 @@ virtualenv:
 
 before_install:
  - sudo apt-get update -qq
- - sudo apt-get install -y python2.7 gir1.2-gtk-3.0 python-gi-cairo python-mpltoolkits.basemap python-numpy python-matplotlib python-libhamlib2
+ - sudo apt-get install -y python2.7 gir1.2-gtk-3.0 python-gi-cairo python-mpltoolkits.basemap python-numpy python-matplotlib python-libhamlib2 python-sphinx
  - "export DISPLAY=:99.0"
  - "sh -e /etc/init.d/xvfb start"