diff --git a/README.md b/README.md
index 45749b7..e6a897f 100644
--- a/README.md
+++ b/README.md
@@ -11,12 +11,14 @@ Incrementals are stored outside of the chroot using hard links or btrfs snapshot
 (So incrementals are not available for clients). Using this method we can keep tens 
 of backup of each client securely and not using too much space.
 
+~~~
                                     Backup server
                                     ************
 Server 1 ------ SSH/rsync ------->  * tcp/2222 *
                                     *          *
 Server 2 ------ SSH/rsync ------->  * tcp/2223 *
                                     ************
+~~~
 
 This method uses standard tools (ssh, rsync, cp -al, btrfs subvolume). EvoBackup 
 is used for many years by Evolix for back up each day hundreds of servers which