diff --git a/configure.in b/configure.in
index 3073157..9707d28 100644
--- a/configure.in
+++ b/configure.in
@@ -13,7 +13,7 @@ AC_SUBST(HOST_CPU)
 AC_SUBST(HOST_VENDOR)
 AC_SUBST(HOST_OS)
  
-AM_INIT_AUTOMAKE(xlhtml/xlhtml, 0.4.9.3)
+AM_INIT_AUTOMAKE(xlhtml/xlhtml, 0.5)
 AM_CONFIG_HEADER(config.h)
 
 AC_PROG_CC