diff --git a/configure.ac b/configure.ac
index a0f58c7..d81aed1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-AC_INIT([libisofs], [1.4.9], [http://libburnia-project.org])
+AC_INIT([libisofs], [1.5.1], [http://libburnia-project.org])
 AC_PREREQ([2.50])
 dnl AC_CONFIG_HEADER([config.h])	
 
@@ -40,8 +40,8 @@ dnl
 dnl If LIBISOFS_*_VERSION changes, be sure to change AC_INIT above to match.
 dnl
 LIBISOFS_MAJOR_VERSION=1
-LIBISOFS_MINOR_VERSION=4
-LIBISOFS_MICRO_VERSION=9
+LIBISOFS_MINOR_VERSION=5
+LIBISOFS_MICRO_VERSION=1
 LIBISOFS_VERSION=$LIBISOFS_MAJOR_VERSION.$LIBISOFS_MINOR_VERSION.$LIBISOFS_MICRO_VERSION
 
 AC_SUBST(LIBISOFS_MAJOR_VERSION)
@@ -51,10 +51,10 @@ AC_SUBST(LIBISOFS_VERSION)
 
 dnl Libtool versioning
 LT_RELEASE=$LIBISOFS_MAJOR_VERSION.$LIBISOFS_MINOR_VERSION
-# 2017.09.12 development jump has not yet happened
-# SONAME = 90 - 84 = 6 . Library name = libisofs.6.84.0
-LT_CURRENT=90
-LT_AGE=84
+# 2018.09.15 development jump has not yet happened
+# SONAME = 92 - 86 = 6 . Library name = libisofs.6.86.0
+LT_CURRENT=92
+LT_AGE=86
 LT_REVISION=0
 LT_CURRENT_MINUS_AGE=`expr $LT_CURRENT - $LT_AGE`
 
diff --git a/libisofs/libisofs.h b/libisofs/libisofs.h
index c7cec25..81ae1a2 100644
--- a/libisofs/libisofs.h
+++ b/libisofs/libisofs.h
@@ -4,7 +4,7 @@
 
 /*
  * Copyright (c) 2007-2008 Vreixo Formoso, Mario Danic
- * Copyright (c) 2009-2017 Thomas Schmitt
+ * Copyright (c) 2009-2018 Thomas Schmitt
  *
  * This file is part of the libisofs project; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License version 2 
@@ -94,7 +94,7 @@ extern "C" {
  */
 #define iso_lib_header_version_major  1
 #define iso_lib_header_version_minor  5
-#define iso_lib_header_version_micro  0
+#define iso_lib_header_version_micro  1
 
 /**
  * Get version of the libisofs library at runtime.