I have a system using luks encryption and I want to extend the system partition. Seems to look like Extend a LUKS encrypted partition to fill disk, but a bit different, because my physical disk seems already to be extended to 40g but the encrypted volume stays 18g. Here some info:

lvs root mint-vg -wi-a---- 18.10g swap mint-vg -wi-a---- 1.41g

pvs /dev/mapper/crypt-volume mint-vg lvm2 a-- 19.52g 0 PFree

lsblk sda 8:0 0 40G 0 disk |-sda2 8:2 0 1k 0 part |-sda5 8:5 0 19.5G 0 part | |-crypt-volume 253:0 0 19.5G 0 crypt | |-mint--vg-root 253:1 0 18.1G 0 lvm | |-mint--vg-swap_1 253:2 0 1.4G 0 lvm |-sda1 8:1 0 487M 0 part

What do I need to do to make use of the full 40G disk space of /dev/sda for crypt volume /dev/sda5?

I have a system using luks encryption and I want to extend the system partition. Seems to look like Extend a LUKS encrypted partition to fill disk, but a bit different.
Because my physical disk seems already to be extended to 40g but the encrypted volume stays 18g. Here some info:

lvs
root mint-vg  -wi-a---- 18.10g
swap mint-vg  -wi-a----  1.41g

pvs
/dev/mapper/crypt-volume mint-vg lvm2 a-- 19.52g 0 PFree

lsblk
sda                     8:0  0    40G 0 disk
|-sda2                  8:2  0     1k 0 part
|-sda5                  8:5  0  19.5G 0 part
| |-crypt-volume      253:0  0  19.5G 0 crypt
|   |-mint--vg-root   253:1  0  18.1G 0 lvm 
|   |-mint--vg-swap_1 253:2  0   1.4G 0 lvm
|-sda1                  8:1  0   487M 0 part

What do I need to do to make use of the full 40G disk space of /dev/sda for crypt volume /dev/sda5?