diff --git a/.github/workflows/unit-testing.yml b/.github/workflows/unit-testing.yml
index 2b64331..d39c99a 100644
--- a/.github/workflows/unit-testing.yml
+++ b/.github/workflows/unit-testing.yml
@@ -39,7 +39,7 @@ jobs:
       - name: check-env
         run:  echo "$PATH"
       - name: download
-        run:  perl Kalamari/bin/downloadKalamari.pl --outdir kalamari.out Kalamari/src/chromosomes.tsv
+      run:  perl Kalamari/bin/downloadKalamari.pl --numcpus 2 --outdir kalamari.out Kalamari/src/chromosomes.tsv
       - name: check-results
         run:  tree kalamari.out
       - name: check-file-sizes