diff --git a/doc/bips.md b/doc/bips.md
index 07e5024864c..7fa17cc31a1 100644
--- a/doc/bips.md
+++ b/doc/bips.md
@@ -49,6 +49,7 @@ BIPs that are implemented by Bitcoin Core:
 * [`BIP 173`](https://github.com/bitcoin/bips/blob/master/bip-0173.mediawiki): Bech32 addresses for native Segregated Witness outputs are supported as of **v0.16.0** ([PR 11167](https://github.com/bitcoin/bitcoin/pull/11167)). Bech32 addresses are generated by default as of **v0.20.0** ([PR 16884](https://github.com/bitcoin/bitcoin/pull/16884)).
 * [`BIP 174`](https://github.com/bitcoin/bips/blob/master/bip-0174.mediawiki): RPCs to operate on Partially Signed Bitcoin Transactions (PSBT) are present as of **v0.17.0** ([PR 13557](https://github.com/bitcoin/bitcoin/pull/13557)).
 * [`BIP 176`](https://github.com/bitcoin/bips/blob/master/bip-0176.mediawiki): Bits Denomination [QT only] is supported as of **v0.16.0** ([PR 12035](https://github.com/bitcoin/bitcoin/pull/12035)).
+* [`BIP 323`](https://github.com/bitcoin/bips/blob/master/bip-0323.mediawiki): BIP 9 bits 5 to 28 (inclusive) are ignored for soft-fork signalling and unknown soft fork warnings as of **v31.2**.
 * [`BIP 324`](https://github.com/bitcoin/bips/blob/master/bip-0324.mediawiki): The v2 transport protocol specified by BIP324 and the associated `NODE_P2P_V2` service bit are supported as of **v26.0**, but off by default ([PR 28331](https://github.com/bitcoin/bitcoin/pull/28331)). On by default as of **v27.0** ([PR 29347](https://github.com/bitcoin/bitcoin/pull/29347)).
 * [`BIP 325`](https://github.com/bitcoin/bips/blob/master/bip-0325.mediawiki): Signet test network is supported as of **v0.21.0** ([PR 18267](https://github.com/bitcoin/bitcoin/pull/18267)).
 * [`BIP 327`](https://github.com/bitcoin/bips/blob/master/bip-0327.mediawiki): Key aggregation via `musig()` descriptors is supported as of **v30.0** ([PR 31244](https://github.com/bitcoin/bitcoin/pull/31244)). Signing is supported as of **v31.0** ([PR 29675](https://github.com/bitcoin/bitcoin/pull/29675))
diff --git a/doc/release-notes.md b/doc/release-notes.md
index e57950bac99..c8be8de08ca 100644
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -39,6 +39,10 @@ on them. It is not recommended to use Bitcoin Core on unsupported systems.
 Notable changes
 ===============
 
+- BIP 9 bits 5 to 28 inclusive are now ignored for soft fork signaling, as per
+  BIP 323. We won't warn about unknown deployments when receiving blocks that
+  set any of those bits in their version. (#34779)
+
 ### PrivateBroadcast
 
 This release fixes an ip address leak when using the -privatebroadcast feature.