diff --git a/.travis.yml b/.travis.yml
index 590bfe269..952b0986e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,15 +1,17 @@
 language: bash
 sudo: false
 
 addons:
   apt:
     #sources:
     #  - debian-sid
     packages:
       - libxml2-utils
       - xsltproc
+      - docbook
+      - docbook-xml
       - shellcheck
 script:
   - ./ci/build.sh
 notifications:
   email: false