diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 10ec4db82..5779d7df8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -40,6 +40,7 @@ jobs:
         run: |
           npm run antora
           bin/optimize_crawl -x
+          echo 'doc.owncloud.com' > public/CNAME
 
       - name: Save cache
         if: github.event_name == 'push'