diff --git a/XPS-13-7390-2-in-1--.md b/XPS-13-7390-2-in-1--.md
index f3c344a..62800aa 100644
--- a/XPS-13-7390-2-in-1--.md
+++ b/XPS-13-7390-2-in-1--.md
@@ -54,9 +54,11 @@ Before the last line of the command insert these lines:
         -O keyformat=passphrase \
 ~~~
 
-## to do : find how to change zpool passwd
-
+## in case you wanted to change zpool passwd
 
+~~~
+zfs change-key rpool
+~~~
 
 ## create swap partition to permit Hibernate