diff --git a/deploy.sh b/deploy.sh
index 6277994..aefdd99 100755
--- a/deploy.sh
+++ b/deploy.sh
@@ -84,7 +84,7 @@ else
         chooseDisk WIN_DISK;
     fi;
 
-    sudo shred -vfzn 0 -s 1G "$WIN_DISK";
+    sudo shred -vfzn 0 -s 512M "$WIN_DISK";
 
     {
         echo "o";