diff --git a/.travis.yml b/.travis.yml
index 37c566e..72d1b5c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,7 +11,7 @@ virtualenv:
 
 before_install:
  - sudo apt-get update -qq
- - sudo apt-get install -yq xvfb python3 python3-pip gir1.2-gtk-3.0 python3-gi-cairo python3-flake8 python3-numpy python3-matplotlib python3-sphinx python-libhamlib2
+ - sudo apt-get install -yq xvfb python3 python3-pip gir1.2-gtk-3.0 python3-gi-cairo python3-flake8 python3-numpy python3-matplotlib python3-sphinx python-libhamlib2 python3-bs4
  - "export DISPLAY=:99.0"
  - "sh -e /etc/init.d/xvfb start"