diff --git a/2021.05.10_parallel_calculations_using_sh_files/a.sh b/2021.05.10_parallel_calculations_using_sh_files/a.sh
index 2ea984f..2d1205c 100644
--- a/2021.05.10_parallel_calculations_using_sh_files/a.sh
+++ b/2021.05.10_parallel_calculations_using_sh_files/a.sh
@@ -1,5 +1,4 @@
 #!/bin/sh
 #PBS -N task
 #PBS -l nodes=1:ppn=1
-export OMP_NUM_THREADS=1
 python a.py
\ No newline at end of file