diff --git a/.travis.yml b/.travis.yml
index eb8abdd0..fd8dfb25 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,9 +8,12 @@ cache: pip
 
 addons:
   apt:
+    sources:
+      - pov-wkhtmltopdf
     packages:
       - expect-dev  # provides unbuffer utility
       - python-lxml # because pip installation is slow
+      - wkhtmltopdf
 
 env:
   global: