diff --git a/zosinstalluefipxeondisk.sh b/zosinstalluefipxeondisk.sh
index 2295b6b..3c41441 100644
--- a/zosinstalluefipxeondisk.sh
+++ b/zosinstalluefipxeondisk.sh
@@ -281,7 +281,8 @@ main() {
   mkdir -p "${MOUNT_POINT}/efi/boot"
 
   # Download the required BOOTX64.EFI file
-  EFI_FILE_URL="https://bootstrap.grid.tf/uefi/${ENVIRONMENT}/${FARM}"
+  # EFI_FILE_URL="https://bootstrap.grid.tf/uefi/${ENVIRONMENT}/${FARM}"
+      EFI_FILE_URL="https://bootstrap.grid.tf/uefi/${ENVIRONMENT}/${FARM}/debug/zero-os-development-zos-v4-debug-7d2de62033.efi?version=v4"
   log "Downloading BOOTX64.EFI from ${EFI_FILE_URL}..."
   if ! wget -q "${EFI_FILE_URL}" -O "${MOUNT_POINT}/efi/boot/BOOTX64.EFI"; then
     log "Failed to download BOOTX64.EFI."