diff --git a/README b/README
index 3dcc00c4a4..889a4ea906 100644
--- a/README
+++ b/README
@@ -1,9 +1,9 @@
 ############################################################
-__  __            _  _    ____  ____
-\ \/ /___ _ __   | || |  |___ \|___ \    _ __ ___
- \  // _ \ '_ \  | || |_   __) | __) |__| '__/ __|
- /  \  __/ | | | |__   _| / __/ / __/|__| | | (__
-/_/\_\___|_| |_|    |_|(_)_____|_____|  |_|  \___|
+__  __                                _        _     _
+\ \/ /___ _ __        _   _ _ __  ___| |_ __ _| |__ | | ___
+ \  // _ \ '_ \ _____| | | | '_ \/ __| __/ _` | '_ \| |/ _ \
+ /  \  __/ | | |_____| |_| | | | \__ \ || (_| | |_) | |  __/
+/_/\_\___|_| |_|      \__,_|_| |_|___/\__\__,_|_.__/|_|\___|
 
 ############################################################
 
diff --git a/SUPPORT.md b/SUPPORT.md
index abc7beac5b..021264908c 100644
--- a/SUPPORT.md
+++ b/SUPPORT.md
@@ -9,7 +9,7 @@ for the definitions of the support status levels etc.
 
 # Release Support
 
-    Xen-Version: 4.22-rc
+    Xen-Version: 4.23-unstable
     Initial-Release: n/a
     Supported-Until: TBD
     Security-Support-Until: Unreleased - not yet security-supported
diff --git a/xen/Makefile b/xen/Makefile
index 483901fb2f..d39bdfdd53 100644
--- a/xen/Makefile
+++ b/xen/Makefile
@@ -5,8 +5,8 @@ this-makefile := $(call lastword,$(MAKEFILE_LIST))
 # This is the correct place to edit the build version.
 # All other places this is stored (eg. compile.h) should be autogenerated.
 export XEN_VERSION       = 4
-export XEN_SUBVERSION    = 22
-export XEN_EXTRAVERSION ?= .0-rc3$(XEN_VENDORVERSION)
+export XEN_SUBVERSION    = 23
+export XEN_EXTRAVERSION ?= -unstable$(XEN_VENDORVERSION)
 export XEN_FULLVERSION   = $(XEN_VERSION).$(XEN_SUBVERSION)$(XEN_EXTRAVERSION)
 -include xen-version