diff --git a/configure.ac b/configure.ac
index ffa66e3..502ecd3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,8 +2,8 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ(2.59)
-AC_INIT(libmodbus, 1.3, stephane.raimbault@gmail.com)
-AM_INIT_AUTOMAKE(libmodbus, 1.3.0)
+AC_INIT(libmodbus, 1.9, stephane.raimbault@gmail.com)
+AM_INIT_AUTOMAKE(libmodbus, 1.9.0)
 
 # Checks for programs.
 AC_PROG_CC
diff --git a/wscript b/wscript
index f7a8d09..4088f0f 100644
--- a/wscript
+++ b/wscript
@@ -1,7 +1,7 @@
 #! /usr/bin/env python
 # encoding: utf-8
 
-VERSION='1.2.4'
+VERSION='1.9.0'
 APPNAME='libmodbus'
 
 # these variables are mandatory ('/' are converted automatically)