diff --git a/.travis.yml b/.travis.yml
index a123095..60b33fa 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,6 +9,9 @@ env:
   global:
   - NOKOGIRI_USE_SYSTEM_LIBRARIES=true
 sudo: false
+branches:
+  only:
+  - master
 cache: bundler
 script: JEKYLL_ENV=production bundle exec jekyll build && bundle exec htmlproofer ./_site --disable-external
 before_deploy: