diff --git a/configure.ac b/configure.ac
index 5e92171..6d6818f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-AC_INIT([libisofs], [0.6.4], [http://libburnia-project.org])
+AC_INIT([libisofs], [0.6.6], [http://libburnia-project.org])
 AC_PREREQ([2.50])
 dnl AC_CONFIG_HEADER([config.h])	
 
diff --git a/libisofs/libisofs.h b/libisofs/libisofs.h
index 0c70e78..0da2780 100644
--- a/libisofs/libisofs.h
+++ b/libisofs/libisofs.h
@@ -850,7 +850,7 @@ 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  4
+#define iso_lib_header_version_micro  6
 
 /** 
  * Usage discussion: