diff --git a/configure.ac b/configure.ac
index 3156d09e7..216f612bf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@ dnl require autoconf 2.60 (AS_ECHO/AS_ECHO_N)
 AC_PREREQ([2.60])
 define(_CLIENT_VERSION_MAJOR, 3)
 define(_CLIENT_VERSION_MINOR, 6)
-define(_CLIENT_VERSION_REVISION, 2)
+define(_CLIENT_VERSION_REVISION, 3)
 define(_CLIENT_VERSION_BUILD, 50)
 define(_ZC_BUILD_VAL, m4_if(m4_eval(_CLIENT_VERSION_BUILD < 25), 1, m4_incr(_CLIENT_VERSION_BUILD), m4_eval(_CLIENT_VERSION_BUILD < 50), 1, m4_eval(_CLIENT_VERSION_BUILD - 24), m4_eval(_CLIENT_VERSION_BUILD == 50), 1, , m4_eval(_CLIENT_VERSION_BUILD - 50)))
 define(_CLIENT_VERSION_SUFFIX, m4_if(m4_eval(_CLIENT_VERSION_BUILD < 25), 1, _CLIENT_VERSION_REVISION-beta$1, m4_eval(_CLIENT_VERSION_BUILD < 50), 1, _CLIENT_VERSION_REVISION-rc$1, m4_eval(_CLIENT_VERSION_BUILD == 50), 1, _CLIENT_VERSION_REVISION, _CLIENT_VERSION_REVISION-$1)))
diff --git a/src/clientversion.h b/src/clientversion.h
index 98075253d..b2f606f64 100644
--- a/src/clientversion.h
+++ b/src/clientversion.h
@@ -1,6 +1,6 @@
 // Copyright (c) 2009-2014 The Bitcoin Core developers
 // Copyright (c) 2016-2017 The Zcash developers
-// Copyright (c) 2016-2020 The Hush developers
+// Copyright (c) 2016-2021 The Hush developers
 // Distributed under the GPLv3 software license, see the accompanying
 // file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 /******************************************************************************
@@ -29,7 +29,7 @@
 // Must be kept in sync with configure.ac , ugh!
 #define CLIENT_VERSION_MAJOR 3
 #define CLIENT_VERSION_MINOR 6
-#define CLIENT_VERSION_REVISION 2
+#define CLIENT_VERSION_REVISION 3
 #define CLIENT_VERSION_BUILD 50
 
 //! Set to true for release, false for prerelease or test build
diff --git a/src/version.h b/src/version.h
index 69c48d1a4..bc304b404 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2012-2014 The Bitcoin Core developers
-// Copyright (c) 2016-2020 The Hush developers
+// Copyright (c) 2016-2021 The Hush developers
 // Distributed under the GPLv3 software license, see the accompanying
 // file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 /******************************************************************************
@@ -21,7 +21,7 @@
 #define HUSH_VERSION_H
 
 // network protocol versioning
-static const int PROTOCOL_VERSION = 1987420;
+static const int PROTOCOL_VERSION = 1987421;
 //! initial proto version, to be increased after version/verack negotiation
 static const int INIT_PROTO_VERSION = 209;
 //! In this version, 'getheaders' was introduced.