diff --git a/README.md b/README.md
index d3727cb..24eb374 100644
--- a/README.md
+++ b/README.md
@@ -76,7 +76,7 @@ The host file that contains addresses of connected workers can be created with:
 
 #### run the MPI hello world program
 
-> sudo -u mpi mpirun -n 10 -f /home/ubuntu/hosts  /home/ubuntu/mpi_hello_world
+> mpirun -n 10 -f /home/ubuntu/hosts  /home/ubuntu/mpi_hello_world
 
 
 ---