diff --git a/CHANGELOG.md b/CHANGELOG.md
index d81c7c4e..48c52131 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,13 @@
+# v6.21.0
+- [#3302](https://github.com/xmrig/xmrig/pull/3302) [#3312](https://github.com/xmrig/xmrig/pull/3312) Enabled keepalive for Windows (>= Vista).
+- [#3320](https://github.com/xmrig/xmrig/pull/3320) Added "built for OS/architecture/bits" to "ABOUT".
+- [#3339](https://github.com/xmrig/xmrig/pull/3339) Added SNI option for TLS connections.
+- [#3342](https://github.com/xmrig/xmrig/pull/3342) Update `cn_main_loop.asm`.
+- [#3346](https://github.com/xmrig/xmrig/pull/3346) ARM64 JIT: don't use `x18` register.
+- [#3348](https://github.com/xmrig/xmrig/pull/3348) Update to latest `sse2neon.h`.
+- [#3356](https://github.com/xmrig/xmrig/pull/3356) Updated pricing record size for **Zephyr** solo mining.
+- [#3358](https://github.com/xmrig/xmrig/pull/3358) **Zephyr** solo mining: handle multiple outputs.
+
 # v6.20.0
 - Added new ARM CPU names.
 - [#2394](https://github.com/xmrig/xmrig/pull/2394) Added new CMake options `ARM_V8` and `ARM_V7`.
diff --git a/src/version.h b/src/version.h
index 5bf1b2f5..7e2b085a 100644
--- a/src/version.h
+++ b/src/version.h
@@ -22,15 +22,15 @@
 #define APP_ID        "xmrig"
 #define APP_NAME      "XMRig"
 #define APP_DESC      "XMRig miner"
-#define APP_VERSION   "6.20.1-dev"
+#define APP_VERSION   "6.21.0-dev"
 #define APP_DOMAIN    "xmrig.com"
 #define APP_SITE      "www.xmrig.com"
 #define APP_COPYRIGHT "Copyright (C) 2016-2023 xmrig.com"
 #define APP_KIND      "miner"
 
 #define APP_VER_MAJOR  6
-#define APP_VER_MINOR  20
-#define APP_VER_PATCH  1
+#define APP_VER_MINOR  21
+#define APP_VER_PATCH  0
 
 #ifdef _MSC_VER
 #   if (_MSC_VER >= 1930)