diff --git a/Doxyfile b/Doxyfile
index 87fc537..46586c1 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -5,7 +5,7 @@
 #---------------------------------------------------------------------------
 DOXYFILE_ENCODING      = UTF-8
 PROJECT_NAME           = libunibreak
-PROJECT_NUMBER         = 5.1
+PROJECT_NUMBER         = 6.0
 PROJECT_BRIEF          =
 PROJECT_LOGO           =
 OUTPUT_DIRECTORY       = doc
diff --git a/NEWS b/NEWS
index ed9411b..2d2e1a9 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,11 @@
+New in libunibreak 6.0
+
+- Add East Asian Width support and improve line breaking algorithm
+- Add Indic Conjunct Break support and improve grapheme breaking algorithm
+- Update the data (except line breaking) to conform to Unicode 15.1
+- Include test data files in the project
+- Make minor code adjustment and refactoring
+
 New in libunibreak 5.1
 
 - Speed up line-break property lookup
diff --git a/configure.ac b/configure.ac
index f0bfe2c..67853d0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 AC_PREREQ(2.57)
-AC_INIT([libunibreak],[5.1],[wuyongwei@gmail.com])
+AC_INIT([libunibreak],[6.0],[wuyongwei@gmail.com])
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_SRCDIR([src/linebreak.c])
 AC_CONFIG_HEADERS([config.h])
diff --git a/src/Makefile.am b/src/Makefile.am
index 6cc3ec6..d0c87aa 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -8,7 +8,7 @@ include_HEADERS = \
 lib_LTLIBRARIES = libunibreak.la
 
 libunibreak_la_CFLAGS = -W -Wall
-libunibreak_la_LDFLAGS = -no-undefined -version-info 5:1:0
+libunibreak_la_LDFLAGS = -no-undefined -version-info 6:0:0
 libunibreak_la_SOURCES = \
 	unibreakbase.c \
 	unibreakdef.c \
diff --git a/src/unibreakbase.h b/src/unibreakbase.h
index 9cc4aca..b6b6334 100644
--- a/src/unibreakbase.h
+++ b/src/unibreakbase.h
@@ -4,7 +4,7 @@
  * Break processing in a Unicode sequence.  Designed to be used in a
  * generic text renderer.
  *
- * Copyright (C) 2015-2022 Wu Yongwei <wuyongwei at gmail dot com>
+ * Copyright (C) 2015-2024 Wu Yongwei <wuyongwei at gmail dot com>
  *
  * This software is provided 'as-is', without any express or implied
  * warranty.  In no event will the author be held liable for any damages
@@ -39,7 +39,7 @@
 extern "C" {
 #endif
 
-#define UNIBREAK_VERSION   0x0501   /**< Version of the libunibreak */
+#define UNIBREAK_VERSION   0x0600   /**< Version of the libunibreak */
 extern const int unibreak_version;
 
 #ifndef UNIBREAK_UTF_TYPES_DEFINED