diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index e9f4844..0039797 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -39,4 +39,4 @@ jobs:
           # FIXME: use built-in "additiveFoam" smaller case when created
           blockMesh
           decomposePar
-          mpirun -n 6 --oversubscribe additiveFoam -parallel > log.additiveFoam
+          mpirun -n 6 --oversubscribe --allow-run-as-root additiveFoam -parallel > log.additiveFoam