diff --git a/.travis.yml b/.travis.yml
index 0a30061ab..6ba25131a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,11 @@
 # Config file .travis.yml
 
-sudo: required
+addons:
+  apt:
+    packages:
+      - expect-dev  # provides unbuffer utility
+      - python-lxml # because pip installation is slow
+
 language: python
 
 python: