diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 61a3c21d0a2566673814583e940fa18f2b25c94b..19e842f418342a17f50bd7313e9f4bf778523f62 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,7 +2,7 @@ before_script:
   - module add  python/3.6.1-2-anaconda
   - pip install --user pytest-pythonpath==0.7.1 pytest-cov==2.5.1
   - module load nextflow/0.31.0
-  - ulimit -Ss unlimited
+  - ulimit -u unlimited
   - ln -s /project/shared/bicf_workflow_ref/workflow_testdata/chipseq/*fastq.gz test_data/
 
 stages: