diff --git a/installer/flash-all.sh b/installer/flash-all.sh
index 0d71b45..c4049e2 100755
--- a/installer/flash-all.sh
+++ b/installer/flash-all.sh
@@ -45,7 +45,7 @@
 fi
 echo "android out dir:$OUT_IMGDIR"
 
-python ${INSTALLER_DIR}/hisi-idt.py --img1=${INSTALLER_DIR}/l-loader.bin -d ${DEVICE_PORT}
+sudo python ${INSTALLER_DIR}/hisi-idt.py --img1=${INSTALLER_DIR}/l-loader.bin -d ${DEVICE_PORT}
 fastboot flash ptable ${INSTALLER_DIR}/${PTABLE}
 fastboot flash fastboot ${INSTALLER_DIR}/fip.bin
 fastboot flash nvme ${INSTALLER_DIR}/nvme.img