diff --git a/configure b/configure
index fdffd0c4..47459a70 100755
--- a/configure
+++ b/configure
@@ -2792,9 +2792,9 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
 CLIXON_VERSION_MAJOR="6"
-CLIXON_VERSION_MINOR="2"
+CLIXON_VERSION_MINOR="3"
 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 d9c9365c..df8f9eca 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="2"
+CLIXON_VERSION_MINOR="3"
 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]),[