diff --git a/.travis.yml b/.travis.yml
index 3da50231..ced33cae 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,11 @@
+sudo: required
 language: cpp
 compiler:
   - clang
   - gcc
+before_install:
+  - sudo apt-get -qq update
+  - sudo apt-get install -y groff
 script:
   - mkdir build
   - cd build