diff --git a/bip-0155.mediawiki b/bip-0155.mediawiki
index ba13a5c6..b8a33e34 100644
--- a/bip-0155.mediawiki
+++ b/bip-0155.mediawiki
@@ -7,7 +7,7 @@
   Type: Specification
   Assigned: 2019-02-27
   License: BSD-2-Clause
-  Version: 2.0.0
+  Version: 2.1.0
 </pre>
 
 ==Introduction==
@@ -131,6 +131,8 @@ Further network ID numbers MUST be reserved in a new BIP document.
 
 Clients SHOULD reject messages that contain addresses that have a different length than specified in this table for a specific network ID, as these are meaningless.
 
+Some ranges of the <code>IPV6</code> address space are reserved for embedding addresses of other networks (for example the IPv4-in-IPv6 range <code>::ffff:0:0/96</code>). Such addresses already have a canonical encoding under their own network ID and MUST NOT be sent with the <code>IPV6</code> network ID. Clients SHOULD ignore <code>IPV6</code> addresses that fall into these reserved ranges on receive, since the same address received under two network IDs would otherwise be treated as two distinct peers.
+
 See the appendices for the address encodings to be used for the various networks.
 
 ==Signaling support and compatibility==
@@ -194,6 +196,8 @@ Yggdrasil addresses are simply IPv6 addresses in the <code>0200::/7</code> range
 
 == Changelog ==
 
+* 2.1.0 (2026-08-03):
+** Document that IPv4-in-IPv6 range MUST NOT be sent with the IPV6 network ID and SHOULD be ignored on receive.
 * 2.0.0 (2025-10-01):
 ** Add note that Tor v2 is no longer operational.
 * 1.0.0 (2019-02-27):