Adding IPv6 dual-stack to IPv4 IPSec tunnel

[ewsclass66]

So I have a conventional IPv4 IPSec tunnel with some routes advertised over BGP working perfectly, however I want to add IPv6 support to the tunnel. My current IPSec status is shown below:

I'm using a Cisco IOS-XE box on the other side, and I enable IPv6 overlay by using the following command: tunnel mode ipsec ipv4 v6-overlay.
My question is what do I need to change on PFsense side of things to get this to work? My IPSec config is shown below:

Thanks in advance!