diff --git a/chip-fel-fastboot.sh b/chip-fel-fastboot.sh
index ab35269..ffeafb6 100755
--- a/chip-fel-fastboot.sh
+++ b/chip-fel-fastboot.sh
@@ -124,7 +124,7 @@ ${FEL} exe $UBOOT_MEM_ADDR
 
 echo == waiting for fastboot ==
 if wait_for_fastboot; then
-  fastboot -u flash UBI ${BUILDROOT_OUTPUT_DIR}/images/rootfs.ubi
+  fastboot -S 0 -u flash UBI ${BUILDROOT_OUTPUT_DIR}/images/rootfs.ubi
   fastboot continue
 else
   rm -rf ${TMPDIR}
diff --git a/chip-update-firmware.sh b/chip-update-firmware.sh
index 2bef441..06ad8fc 100755
--- a/chip-update-firmware.sh
+++ b/chip-update-firmware.sh
@@ -69,5 +69,5 @@ cache_download "${FW_IMAGE_DIR}" uboot-env.bin
 cache_download "${FW_IMAGE_DIR}" zImage
 cache_download "${FW_IMAGE_DIR}" u-boot-dtb.bin
 
-BUILDROOT_OUTPUT_DIR="${FW_DIR}" ${FLASH_SCRIPT} erase-bb
+BUILDROOT_OUTPUT_DIR="${FW_DIR}" ${FLASH_SCRIPT}
 exit $?