diff --git a/demos/bash/run_bash_demo.sh b/demos/bash/run_bash_demo.sh
index a42c6373..613e080c 100755
--- a/demos/bash/run_bash_demo.sh
+++ b/demos/bash/run_bash_demo.sh
@@ -16,7 +16,8 @@ pushd occlum_instance
 rm -rf image
 copy_bom -f $bomfile --root image --include-dir /opt/occlum/etc/template
 
-new_json="$(jq '.resource_limits.user_space_size = "600MB" ' Occlum.json)" && \
+new_json="$(jq '.resource_limits.user_space_size = "600MB" |
+                .resource_limits.kernel_space_stack_size ="2MB"	' Occlum.json)" && \
     echo "${new_json}" > Occlum.json
 
 occlum build