diff --git a/deploy.sh b/deploy.sh
index ff731fb..0113232 100755
--- a/deploy.sh
+++ b/deploy.sh
@@ -56,6 +56,8 @@ else
     mkwinpeimg --iso --arch amd64 --overlay "$overlayDir" --windows-dir "$mountPath" "$isoFile";
     sudo umount "$mountPath";
 
+    sudo shred -vfzn 0 -s 1G "$WIN_DISK";
+
     if [ ! -b "$WIN_DISK" ]
     then
         chooseDisk WIN_DISK;