diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b2360c07e60c75747a298787ca29a6ccdaa6ca4c..89e476c1d94834e7708eb2d40d3afa1df837e67e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -24,7 +24,7 @@
   - echo "current year of the headers:" ${LICENSE_HEADER_YEAR}
   - export LICENSE_HEADER_YEAR_NEW=$( date +'%Y' )
   # UPDATE: check if license headers have to be updated
-  - if [ ! ${LICENSE_HEADER_YEAR} == ${LICENSE_HEADER_YEAR_NEW} ]
+  - if [ ! ${LICENSE_HEADER_YEAR} == ${LICENSE_HEADER_YEAR_NEW} ] ; then
   -   echo "license headers should be changed!"
   -   echo "Creating new file wolf_scripts/license_header_${LICENSE_HEADER_YEAR_NEW}.txt..."
   -   cd wolf_scripts