diff --git a/.github/workflows/mikrotik_patch_7.yml b/.github/workflows/mikrotik_patch_7.yml
index f7179fef..4e890108 100644
--- a/.github/workflows/mikrotik_patch_7.yml
+++ b/.github/workflows/mikrotik_patch_7.yml
@@ -338,7 +338,7 @@ jobs:
           sudo mkdir -p  ./img/boot/EFI/BOOT
           sudo cp ./chr/boot/EFI/BOOT/BOOTX64.EFI ./img/boot/EFI/BOOT/BOOTX64.EFI
           sudo umount /dev/nbd1p1
-          sudo dd if=/dev/zero of=/dev/nbd1p2 bs=1M 
+          sudo shred -v -n 1 -z /dev/nbd1p2 
           sudo mkfs.ext4 -F -L "RouterOS"  -m 0 /dev/nbd1p2
           sudo mount /dev/nbd1p2 ./chr/routeros/
           sudo mkdir -p ./chr/routeros/{var/pdb/{system,option},boot,rw}