diff --git a/configure.ac b/configure.ac
index 0bb299b..37ea7fd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@
 
 m4_define(x_package_name, mrw-c++)
 m4_define(x_major, 4)
-m4_define(x_minor, 2)
+m4_define(x_minor, 3)
 
 m4_include(ax_cxx_compile_stdcxx_11.m4)
 AC_ALIAS([AC_DEFINE_DIR], [AX_DEFINE_DIR])