diff --git a/XPS-13-7390-2-in-1--.md b/XPS-13-7390-2-in-1--.md
index 5d3b751..5484638 100644
--- a/XPS-13-7390-2-in-1--.md
+++ b/XPS-13-7390-2-in-1--.md
@@ -138,9 +138,14 @@ kernel lockdown prevent hibernation :
 ## encrypt swap partition
 
 ~~~
+apt-get install ecryptfs-utils
 apt install cryptsetup-bin
+swapoff -a
+cryptsetup luksFormat --cipher aes-xts-plain64 --verify-passphrase --key-size 256 /dev/nvme0n1p2
 ~~~
 
+[](https://help.ubuntu.com/community/EnableHibernateWithEncryptedSwap#Preparation)
+
 # rotate
 
 ~~~