diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 4429d27f3ce34405892ed9970ebf142f15baa9b0..a396d7956fe424217080c45426f25dc4f376486b 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -29,7 +29,7 @@
   -   echo "Creating new file wolf_scripts/license_header_${LICENSE_HEADER_YEAR_NEW}.txt..."
   -   cd wolf_scripts
   -   cp license_header_${LICENSE_HEADER_YEAR}.txt license_header_${LICENSE_HEADER_YEAR_NEW}.txt
-  -   sed -e "s/${LICENSE_HEADER_YEAR}/'${LICENSE_HEADER_YEAR},${LICENSE_HEADER_YEAR_NEW}'/g" license_header_${LICENSE_HEADER_YEAR_NEW}.txt
+  -   sed -i "s/${LICENSE_HEADER_YEAR}/${LICENSE_HEADER_YEAR},${LICENSE_HEADER_YEAR_NEW}/g" license_header_${LICENSE_HEADER_YEAR_NEW}.txt
   -   git add license_header_${LICENSE_HEADER_YEAR_NEW}.txt
   -   ./license_manager.sh --update --path=.. --license-header=license_header_${LICENSE_HEADER_YEAR_NEW}.txt
   # ADD: add license headers 
@@ -42,7 +42,7 @@
   # push changes (if any)
   - git config --global user.email "${CI_EMAIL}"
   - git config --global user.name "${CI_USERNAME}"
-  - if git commit -u -m "license headers added or modified" ; then
+  - if git commit -u -m "[skip ci] license headers added or modified" ; then
   -   git remote set-url --push origin "ssh://git@gitlab.iri.upc.edu:2202/${CI_PROJECT_PATH}.git"
   -   git push origin HEAD:${CI_COMMIT_REF_NAME}
   - else