diff --git a/CHANGELOG.md b/CHANGELOG.md
index 433e8967..09db1414 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 # Clixon Changelog
 
+* [6.4.0](#640) Expected: October 2023
 * [6.3.0](#630) 29 July 2023
 * [6.2.0](#620) 30 April 2023
 * [6.1.0](#610) 19 Feb 2023
@@ -40,6 +41,9 @@
 * [3.3.2](#332) Aug 27 2017
 * [3.3.1](#331) June 7 2017
 
+## 6.4.0
+Expected: October 2023
+
 ## 6.3.0
 29 July 2023
 
@@ -61,7 +65,7 @@ Users may have to change how they access the system
   * Restructured and extended stats rpc to schema mountpoints
   * rpc `<stats>` is not backward compatible
 * New `clixon-autocli@2023-05-01.yang` revision
-  * New `alias` and `skip` extensions
+  * New `alias` and `skip` extensions (NOTE: just added in YANG, not implemented)
   * New `grouping-treeref` option
   
 ### C/CLI-API changes on existing features
diff --git a/configure b/configure
index 3e941dca..ac62ec50 100755
--- a/configure
+++ b/configure
@@ -2800,9 +2800,9 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
 CLIXON_VERSION_MAJOR="6"
-CLIXON_VERSION_MINOR="3"
+CLIXON_VERSION_MINOR="4"
 CLIXON_VERSION_PATCH="0"
-CLIXON_VERSION="\"${CLIXON_VERSION_MAJOR}.${CLIXON_VERSION_MINOR}.${CLIXON_VERSION_PATCH}\""
+CLIXON_VERSION="\"${CLIXON_VERSION_MAJOR}.${CLIXON_VERSION_MINOR}.${CLIXON_VERSION_PATCH}.PRE\""
 
 # Debug flag
 # Check whether --enable-debug was given.
diff --git a/configure.ac b/configure.ac
index 80f1d7aa..17e65317 100644
--- a/configure.ac
+++ b/configure.ac
@@ -49,9 +49,9 @@ AC_CONFIG_SRCDIR([lib/clixon/clixon.h.in])
 AC_CONFIG_AUX_DIR(config-aux)
 
 CLIXON_VERSION_MAJOR="6"
-CLIXON_VERSION_MINOR="3"
+CLIXON_VERSION_MINOR="4"
 CLIXON_VERSION_PATCH="0"
-CLIXON_VERSION="\"${CLIXON_VERSION_MAJOR}.${CLIXON_VERSION_MINOR}.${CLIXON_VERSION_PATCH}\""
+CLIXON_VERSION="\"${CLIXON_VERSION_MAJOR}.${CLIXON_VERSION_MINOR}.${CLIXON_VERSION_PATCH}.PRE\""
 
 # Debug flag
 AC_ARG_ENABLE(debug, AS_HELP_STRING([--enable-debug],[Build with debug symbols, default: no]),[