diff --git a/.travis.yml b/.travis.yml
index 537b05fc..daab1d19 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -32,6 +32,7 @@ addons:
       - texinfo
       - device-tree-compiler
       - libusb-1.0-0-dev
+      - python-pexpect
 
 
 # blacklist private branches