diff --git a/tailcfg/tailcfg.go b/tailcfg/tailcfg.go
index 0b9f99593..5b38218c0 100644
--- a/tailcfg/tailcfg.go
+++ b/tailcfg/tailcfg.go
@@ -189,7 +189,8 @@ type CapabilityVersion int
 //   - 140: 2026-05-27: Client understands [NodeAttrDisableUDPGRO], [NodeAttrDisableUDPGSO], [NodeAttrDisableTUNUDPGRO], [NodeAttrDisableTUNTCPGRO]
 //   - 141: 2026-05-28: Client understands [NodeAttrNeverGSOEqualTail]
 //   - 142: 2026-07-06: Client understands c2n /remoteapi/localapi/* proxy
-const CurrentCapabilityVersion CapabilityVersion = 142
+//   - 143: 2026-07-22: Client correctly ignores conn25 node attributes when not enabled by environment variable
+const CurrentCapabilityVersion CapabilityVersion = 143
 
 // ID is an integer ID for a user, node, or login allocated by the
 // control plane.