diff --git a/configure.ac b/configure.ac
index 7f6e481..b6435ea 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-AC_INIT([libisofs], [0.6.20], [http://libburnia-project.org])
+AC_INIT([libisofs], [0.6.21], [http://libburnia-project.org])
 AC_PREREQ([2.50])
 dnl AC_CONFIG_HEADER([config.h])	
 
@@ -44,7 +44,7 @@ dnl If LIBISOFS_*_VERSION changes, be sure to change AC_INIT above to match.
 dnl
 LIBISOFS_MAJOR_VERSION=0
 LIBISOFS_MINOR_VERSION=6
-LIBISOFS_MICRO_VERSION=20
+LIBISOFS_MICRO_VERSION=21
 LIBISOFS_VERSION=$LIBISOFS_MAJOR_VERSION.$LIBISOFS_MINOR_VERSION.$LIBISOFS_MICRO_VERSION
 
 AC_SUBST(LIBISOFS_MAJOR_VERSION)
diff --git a/libisofs/libisofs.h b/libisofs/libisofs.h
index f85e2e0..be4be9a 100644
--- a/libisofs/libisofs.h
+++ b/libisofs/libisofs.h
@@ -1090,7 +1090,7 @@ int iso_lib_is_compatible(int major, int minor, int micro);
  */
 #define iso_lib_header_version_major  0
 #define iso_lib_header_version_minor  6
-#define iso_lib_header_version_micro  20
+#define iso_lib_header_version_micro  21
 
 /**
  * Usage discussion: