diff --git a/.travis.yml b/.travis.yml
index 1898be4..c415b39 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -24,6 +24,7 @@ after_success: npx nyc report --reporter=text-lcov > coverage.lcov && npx codeco
 jobs:
   include:
     - stage: check
+      os: linux
       script:
         - npx aegir build --bundlesize
         - npx aegir dep-check