diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 29c95467ab7eec285ce349e25cb061675cce76b4..dffbd85fb091651044ad3ac8aff6f44169ce46d1 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -49,7 +49,7 @@ ext_links:
   - echo https://docs.it4i.cz/devel/$CI_BUILD_REF_NAME/
   - wget --spider -e robots=off -o wget.log -r -p https://docs.it4i.cz/devel/$CI_BUILD_REF_NAME/
   after_script:
-  - sed wget.log -n '/^Found .* broken links.$/,$p'
+  - sed -n '/^Found .* broken links.$/,$p' wget.log
 
 mkdocs:
   stage: build