diff --git a/scripts/create-uefi.sh b/scripts/create-uefi.sh
index 0f39149..c186f25 100755
--- a/scripts/create-uefi.sh
+++ b/scripts/create-uefi.sh
@@ -21,3 +21,5 @@ echo "Create UEFI"
 curl -o /tmp/pi4-uefi.zip -L https://github.com/pftf/RPi4/releases/download/v1.35/RPi4_UEFI_Firmware_v1.35.zip
 unzip /tmp/pi4-uefi.zip -d $BOOT_DIR
 sync
+
+umount $BOOT_DIR