diff --git a/xorriso/configure_ac.txt b/xorriso/configure_ac.txt
index 769f8845..5badf571 100644
--- a/xorriso/configure_ac.txt
+++ b/xorriso/configure_ac.txt
@@ -16,7 +16,7 @@ AC_SUBST(BURN_MICRO_VERSION)
 
 LIBISOFS_MAJOR_VERSION=0
 LIBISOFS_MINOR_VERSION=6
-LIBISOFS_MICRO_VERSION=20
+LIBISOFS_MICRO_VERSION=21
 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 0e7a2b28..5dfe1e1a 100644
--- a/xorriso/xorriso_timestamp.h
+++ b/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2009.05.31.100315"
+#define Xorriso_timestamP "2009.05.31.185819"