diff --git a/.drone.yml b/.drone.yml
index 4867161..f2654a3 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -21,6 +21,7 @@ steps:
     commands:
       - bundle install --jobs=3 --retry=3 --deployment
       - yarn install
+      - bundle exec rake css:build
       - bundle exec rspec
     when:
       branch: