diff --git a/deploy/build b/deploy/build
index f0c3a8b3842..65411d3409f 100755
--- a/deploy/build
+++ b/deploy/build
@@ -29,7 +29,7 @@ bundle install --deployment --jobs 4 \
     --binstubs "$bundle_dir/bin" \
     --without 'deploy development doc test'
 
-bundle exec yarn install
+bundle exec yarn install --prod
 
 set +x