diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@
 )
 
 project(bitcoin-abc
-	VERSION 0.21.0
+	VERSION 0.21.1
 	DESCRIPTION "Bitcoin ABC is a full node implementation of the Bitcoin Cash protocol."
 	HOMEPAGE_URL "https://www.bitcoinabc.org"
 )
diff --git a/configure.ac b/configure.ac
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@
 AC_PREREQ([2.60])
 define(_CLIENT_VERSION_MAJOR, 0)
 define(_CLIENT_VERSION_MINOR, 21)
-define(_CLIENT_VERSION_REVISION, 0)
+define(_CLIENT_VERSION_REVISION, 1)
 define(_CLIENT_VERSION_IS_RELEASE, true)
 define(_COPYRIGHT_YEAR, 2019)
 define(_COPYRIGHT_HOLDERS,[The %s developers])
diff --git a/doc/release-notes.md b/doc/release-notes.md
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -1,25 +1,6 @@
-Bitcoin ABC version 0.21.0 is now available from:
+Bitcoin ABC version 0.21.1 is now available from:
 
-  <https://download.bitcoinabc.org/0.21.0/>
+  <https://download.bitcoinabc.org/0.21.1/>
 
 This release includes the following features and fixes:
-  - The RPC `getrpcinfo` returns runtime details of the RPC server. At the moment
-    it returns the active commands and the corresponding execution time.
-  - `ischange` field of boolean type that shows if an address was used for change
-    output was added to `getaddressinfo` method response.
-  - Bump automatic replay protection to Nov 2020 upgrade.
-  - Re-introduction of BIP9, info available from the `getblockchaininfo` RPC.
-  - Miner infrastructure funding plan available via BIP9.
-  - Various bug fixes and stability improvements.
-
-New RPC methods
----------------
-  - `getnodeaddresses` returns peer addresses known to this node. It may be used to connect to nodes over TCP without using the DNS seeds.
-
-Network upgrade
----------------
-At the MTP time of 1589544000 (May 15, 2020 12:00:00 UTC) the following behaviors will change:
-  - The default for max number of in-pool ancestors (`-limitancestorcount`) is changed from 25 to 50.
-  - The default for max number of in-pool descendants (`-limitdescendantcount`) is changed from 25 to 50.
-  - OP_REVERSEBYTES support in script.
-  - New SigOps counting method (SigChecks) as standardness and consensus rules.
+  - Tweaked BIP9 behavior so that miners do not vote for IFP by default unintentionally.
diff --git a/doc/release-notes.md b/doc/release-notes/release-notes-0.21.0.md
copy from doc/release-notes.md
copy to doc/release-notes/release-notes-0.21.0.md