diff --git a/.travis.yml b/.travis.yml
index 1867a63..6532d47 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,9 @@
-sudo: required
+addons:
+  apt:
+    packages:
+      - expect-dev  # provides unbuffer utility
+      - python-lxml # because pip installation is slow
+
 language: python
 
 python: