diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c705af8c54c7e4713289e42e72764353a79a34e4..30d503d9c2a7abf5397814a28125dbd34f19a2ed 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -160,7 +160,7 @@ test:htmlproofer:external_links:
   script:
     - "bundle exec htmlproofer \
         --internal-domains localhost:4000 \
-        --url-ignore 'https://www.openstoragenetwork.org/'
+        --url-ignore 'https://www.openstoragenetwork.org' \
         --assume-extension public/"
   rules:
     - if: '$CI_PIPELINE_SOURCE == "schedule"'