diff --git a/demos/python/run_python_on_occlum.sh b/demos/python/run_python_on_occlum.sh
index d541cf78..441ac9dd 100755
--- a/demos/python/run_python_on_occlum.sh
+++ b/demos/python/run_python_on_occlum.sh
@@ -35,7 +35,7 @@ if [ ! -d "image/lib/python3.7" ];then
     cp -rf ../dataset image
     cp -f ../demo.py image
     new_json="$(jq '.resource_limits.user_space_size = "320MB" |
-                    .resource_limits.kernel_space_heap_size = "144MB" |
+                    .resource_limits.kernel_space_heap_size = "192MB" |
                     .process.default_mmap_size = "256MB"' Occlum.json)" && \
     echo "${new_json}" > Occlum.json
     occlum build