diff --git a/.travis.yml b/.travis.yml
index 9e9b92f42..f0faf2485 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,7 @@ node_js:
 sudo: required
 cache:
   directories:
+  - /home/travis/virtualenv/python2.7/lib/python2.7/site-packages
   - node_modules
 notifications:
   slack: