diff --git a/configure.ac b/configure.ac
index b6762f2..fac50b5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-AC_INIT([libisofs], [0.6.17], [http://libburnia-project.org])
+AC_INIT([libisofs], [0.6.18], [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=17
+LIBISOFS_MICRO_VERSION=18
 LIBISOFS_VERSION=$LIBISOFS_MAJOR_VERSION.$LIBISOFS_MINOR_VERSION.$LIBISOFS_MICRO_VERSION
 
 AC_SUBST(LIBISOFS_MAJOR_VERSION)
@@ -54,11 +54,11 @@ AC_SUBST(LIBISOFS_VERSION)
 
 dnl Libtool versioning
 LT_RELEASE=$LIBISOFS_MAJOR_VERSION.$LIBISOFS_MINOR_VERSION
-# 2009.03.10: development jump has not yet happened
-# SONAME = 18 - 12 = 6 . Library name = libisofs.6.12.0
-LT_CURRENT=18
+# 2009.04.15: development jump has not yet happened
+# SONAME = 20 - 14 = 6 . Library name = libisofs.6.14.0
+LT_CURRENT=20
 LT_REVISION=0
-LT_AGE=12
+LT_AGE=14
 LT_CURRENT_MINUS_AGE=`expr $LT_CURRENT - $LT_AGE`
 
 AC_SUBST(LT_RELEASE)
diff --git a/libisofs/libisofs.h b/libisofs/libisofs.h
index 975e399..77f285a 100644
--- a/libisofs/libisofs.h
+++ b/libisofs/libisofs.h
@@ -1038,7 +1038,7 @@ 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  17
+#define iso_lib_header_version_micro  18
 
 /**
  * Usage discussion: