diff --git a/xorriso/configure_ac.txt b/xorriso/configure_ac.txt
index b9d381cb..9a7c0391 100644
--- a/xorriso/configure_ac.txt
+++ b/xorriso/configure_ac.txt
@@ -29,7 +29,7 @@ AC_SUBST(BURN_MICRO_VERSION)
 
 LIBISOFS_MAJOR_VERSION=1
 LIBISOFS_MINOR_VERSION=0
-LIBISOFS_MICRO_VERSION=7
+LIBISOFS_MICRO_VERSION=9
 AC_SUBST(LIBISOFS_MAJOR_VERSION)
 AC_SUBST(LIBISOFS_MINOR_VERSION)
 AC_SUBST(LIBISOFS_MICRO_VERSION)
diff --git a/xorriso/xorriso_timestamp.h b/xorriso/xorriso_timestamp.h
index f8907ffb..e3120927 100644
--- a/xorriso/xorriso_timestamp.h
+++ b/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2011.05.12.175155"
+#define Xorriso_timestamP "2011.05.12.175423"