diff --git a/CHANGELOG.md b/CHANGELOG.md
index aa4398f2..b995eb3c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,14 @@
+# 2026-05-30 version 8.0.0
+  * Add old style find boost applying option to cmake. (#1172)
+  * Add missing include type_traits (#1162)
+  * Remove duplicated include (#1156, #1157)
+  * Fix MSVC C++20 modules error for nested msgpack::object::with_zone (#1154)
+  * Refine CI (#1150, #1151, #1163)
+  * Refine documents (#1146, #1149)
+
+## << breaking changes >>
+  * Update cmake minimum required to 3.5-4.0 (#1159)
+
 # 2024-11-02 version 7.0.0
   * Refine build system (#1133)
   * Refine CI (#1122)
diff --git a/README.md b/README.md
index 69e3c3e1..108ba1c6 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 `msgpack` for C++
 ===================
 
-Version 7.0.0 [![Build Status](https://github.com/msgpack/msgpack-c/workflows/CI/badge.svg?branch=cpp_master)](https://github.com/msgpack/msgpack-c/actions) [![Build status](https://ci.appveyor.com/api/projects/status/8kstcgt79qj123mw/branch/cpp_master?svg=true)](https://ci.appveyor.com/project/redboltz/msgpack-c/branch/cpp_master)
+Version 8.0.0 [![Build Status](https://github.com/msgpack/msgpack-c/workflows/CI/badge.svg?branch=cpp_master)](https://github.com/msgpack/msgpack-c/actions) [![Build status](https://ci.appveyor.com/api/projects/status/8kstcgt79qj123mw/branch/cpp_master?svg=true)](https://ci.appveyor.com/project/redboltz/msgpack-c/branch/cpp_master)
 [![codecov](https://codecov.io/gh/msgpack/msgpack-c/branch/cpp_master/graph/badge.svg)](https://app.codecov.io/gh/msgpack/msgpack-c/tree/cpp_master)
 
 It's like JSON but smaller and faster.
diff --git a/appveyor.yml b/appveyor.yml
index c0ec57bc..d5e48328 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,4 +1,4 @@
-version: 7.0.0.{build}
+version: 8.0.0.{build}
 
 branches:
   only:
diff --git a/include/msgpack/version_master.hpp b/include/msgpack/version_master.hpp
index 26d2ec3c..56072230 100644
--- a/include/msgpack/version_master.hpp
+++ b/include/msgpack/version_master.hpp
@@ -1,3 +1,3 @@
-#define MSGPACK_VERSION_MAJOR    7
+#define MSGPACK_VERSION_MAJOR    8
 #define MSGPACK_VERSION_MINOR    0
 #define MSGPACK_VERSION_REVISION 0