diff --git a/.travis.yml b/.travis.yml
index ded2d3e..e1bbbed 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,7 @@ cache:
   directories:
   - node_modules
 before_script:
-- npm install web-component-tester bower polylint
+- npm install web-component-tester bower@1.7.9 polylint
 - $(npm bin)/bower install
 - $(npm bin)/polylint --no-recursion
 script: