diff --git a/docs/DECISIONS.md b/docs/DECISIONS.md
index 1112d4d..9474ecd 100644
--- a/docs/DECISIONS.md
+++ b/docs/DECISIONS.md
@@ -122,6 +122,7 @@ All DHCP served by OPNsense:
 - Future options:
   1. OPNsense HA with CARP (requires second USB NIC on another node)
   2. Keep current router as cold standby (swap cables if pm4 fails)
+  3. Protectli Vault as backup router (limited by port speeds)
 
 **Alternative Considered**: Ubiquiti Dream Machine
 - Rejected due to cost and ecosystem lock-in