diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2576fecb9..a88295d54 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+# 2023-02-28 version 6.0.0
+## << breaking changes >>
+  * Change CMake package name of C++ library to msgpack-cxx (#1054)
+    Unified all C++ package, library, cmake, tarball name become msgpack-cxx.
+
 # 2023-01-10 version 5.0.0 for C++
  * Fix config for new MSVC preprocessor (#1040)
 ## << breaking changes >>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index cdfb5f18d..d44df4e21 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,9 +2,9 @@ CMAKE_MINIMUM_REQUIRED (VERSION 3.1 FATAL_ERROR)
 
 CMAKE_POLICY (SET CMP0054 NEW)
 
-PROJECT (msgpackc-cxx LANGUAGES CXX)
+PROJECT (msgpack-cxx LANGUAGES CXX)
 
-ADD_LIBRARY (msgpackc-cxx INTERFACE)
+ADD_LIBRARY (msgpack-cxx INTERFACE)
 
 FILE (READ ${CMAKE_CURRENT_SOURCE_DIR}/include/msgpack/version_master.hpp contents)
 STRING (REGEX MATCH "#define MSGPACK_VERSION_MAJOR *([0-9a-zA-Z_]*)" NULL_OUT ${contents})
@@ -57,11 +57,11 @@ ENDIF ()
 
 IF (MSGPACK_32BIT)
     IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-        TARGET_COMPILE_OPTIONS(msgpackc-cxx INTERFACE -m32)
-        TARGET_LINK_OPTIONS(msgpackc-cxx INTERFACE -m32)
+        TARGET_COMPILE_OPTIONS(msgpack-cxx INTERFACE -m32)
+        TARGET_LINK_OPTIONS(msgpack-cxx INTERFACE -m32)
     ELSEIF ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
-        TARGET_COMPILE_OPTIONS(msgpackc-cxx INTERFACE -m32)
-        TARGET_LINK_OPTIONS(msgpackc-cxx INTERFACE -m32)
+        TARGET_COMPILE_OPTIONS(msgpack-cxx INTERFACE -m32)
+        TARGET_LINK_OPTIONS(msgpack-cxx INTERFACE -m32)
     ENDIF ()
 ENDIF ()
 
@@ -78,18 +78,18 @@ IF (MSGPACK_USE_BOOST)
 
     FIND_PACKAGE (Boost REQUIRED)
 ELSE ()
-    TARGET_COMPILE_DEFINITIONS(msgpackc-cxx INTERFACE MSGPACK_NO_BOOST)
+    TARGET_COMPILE_DEFINITIONS(msgpack-cxx INTERFACE MSGPACK_NO_BOOST)
 ENDIF ()
 
 IF (MSGPACK_CHAR_SIGN)
-    TARGET_COMPILE_OPTIONS(msgpackc-cxx INTERFACE -f${MSGPACK_CHAR_SIGN}-char)
+    TARGET_COMPILE_OPTIONS(msgpack-cxx INTERFACE -f${MSGPACK_CHAR_SIGN}-char)
 ENDIF ()
 
 IF (MSGPACK_DEFAULT_API_VERSION)
-    TARGET_COMPILE_DEFINITIONS(msgpackc-cxx INTERFACE MSGPACK_DEFAULT_API_VERSION=${MSGPACK_DEFAULT_API_VERSION})
+    TARGET_COMPILE_DEFINITIONS(msgpack-cxx INTERFACE MSGPACK_DEFAULT_API_VERSION=${MSGPACK_DEFAULT_API_VERSION})
 ELSE ()
     SET (MSGPACK_DEFAULT_API_VERSION 3)
-    TARGET_COMPILE_DEFINITIONS(msgpackc-cxx INTERFACE MSGPACK_DEFAULT_API_VERSION=3)
+    TARGET_COMPILE_DEFINITIONS(msgpack-cxx INTERFACE MSGPACK_DEFAULT_API_VERSION=3)
 ENDIF ()
 
 IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
@@ -112,7 +112,7 @@ ENDIF ()
 
 INCLUDE (Files.cmake)
 
-TARGET_INCLUDE_DIRECTORIES (msgpackc-cxx
+TARGET_INCLUDE_DIRECTORIES (msgpack-cxx
     INTERFACE
         $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
         $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/include>
@@ -120,7 +120,7 @@ TARGET_INCLUDE_DIRECTORIES (msgpackc-cxx
 )
 
 IF (MSGPACK_USE_BOOST)
-    TARGET_LINK_LIBRARIES (msgpackc-cxx INTERFACE Boost::boost)
+    TARGET_LINK_LIBRARIES (msgpack-cxx INTERFACE Boost::boost)
 ENDIF ()
 
 IF (MSGPACK_GEN_COVERAGE)
@@ -156,7 +156,7 @@ IF (MSGPACK_FUZZ_REGRESSION)
 ENDIF ()
 
 IF ("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "sparc")
-    TARGET_COMPILE_DEFINITIONS(msgpackc-cxx INTERFACE MSGPACK_ZONE_ALIGN=8)
+    TARGET_COMPILE_DEFINITIONS(msgpack-cxx INTERFACE MSGPACK_ZONE_ALIGN=8)
 ENDIF ()
 
 IF (MSGPACK_BUILD_EXAMPLES)
@@ -193,9 +193,9 @@ ENDIF ()
 include (GNUInstallDirs)
 
 # Install library.
-INSTALL (TARGETS msgpackc-cxx
-         EXPORT msgpackc-cxx-targets
-         COMPONENT msgpackc-cxx
+INSTALL (TARGETS msgpack-cxx
+         EXPORT msgpack-cxx-targets
+         COMPONENT msgpack-cxx
          # This provides include directory in exported target
          # relative to prefix in single directory we've put everything in.
          INCLUDES DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
@@ -204,7 +204,7 @@ INSTALL (TARGETS msgpackc-cxx
 # Install headers from source tree.
 INSTALL (DIRECTORY include/
          DESTINATION include
-         COMPONENT msgpackc-cxx
+         COMPONENT msgpack-cxx
 )
 
 INCLUDE (CMakePackageConfigHelpers)
@@ -212,18 +212,18 @@ INCLUDE (CMakePackageConfigHelpers)
 IF (NOT (CMAKE_VERSION VERSION_LESS 3.14))
     SET (extra_version_file_args ARCH_INDEPENDENT)
 ENDIF ()
-SET (cmake_config_path "${CMAKE_INSTALL_LIBDIR}/cmake/msgpackc-cxx")
+SET (cmake_config_path "${CMAKE_INSTALL_LIBDIR}/cmake/msgpack-cxx")
 
 # Configure the main package file from source tree.
 CONFIGURE_PACKAGE_CONFIG_FILE (
-    msgpackc-cxx-config.cmake.in
-    "${CMAKE_CURRENT_BINARY_DIR}/msgpackc-cxx-config.cmake"
+    msgpack-cxx-config.cmake.in
+    "${CMAKE_CURRENT_BINARY_DIR}/msgpack-cxx-config.cmake"
     INSTALL_DESTINATION "${cmake_config_path}"
 )
 
 # Write package version file.
 WRITE_BASIC_PACKAGE_VERSION_FILE (
-    msgpackc-cxx-config-version.cmake
+    msgpack-cxx-config-version.cmake
     VERSION ${VERSION}
     COMPATIBILITY SameMajorVersion
     ${extra_version_file_args}
@@ -231,16 +231,16 @@ WRITE_BASIC_PACKAGE_VERSION_FILE (
 
 # Install the generated package version file and the main package file.
 INSTALL (FILES
-    "${CMAKE_CURRENT_BINARY_DIR}/msgpackc-cxx-config.cmake"
-    "${CMAKE_CURRENT_BINARY_DIR}/msgpackc-cxx-config-version.cmake"
+    "${CMAKE_CURRENT_BINARY_DIR}/msgpack-cxx-config.cmake"
+    "${CMAKE_CURRENT_BINARY_DIR}/msgpack-cxx-config-version.cmake"
     DESTINATION "${cmake_config_path}"
-    COMPONENT msgpackc-cxx
+    COMPONENT msgpack-cxx
 )
 
 # This installs package in install tree for using installed targets.
 INSTALL (
-    EXPORT msgpackc-cxx-targets
-    FILE msgpackc-cxx-targets.cmake
+    EXPORT msgpack-cxx-targets
+    FILE msgpack-cxx-targets.cmake
     DESTINATION "${cmake_config_path}"
-    COMPONENT msgpackc-cxx
+    COMPONENT msgpack-cxx
 )
diff --git a/Files.cmake b/Files.cmake
index 9e508244b..5cdf80afd 100644
--- a/Files.cmake
+++ b/Files.cmake
@@ -1,4 +1,4 @@
-SET (msgpackc_HEADERS
+SET (msgpack-cxx_HEADERS
     include/msgpack.hpp
     include/msgpack/adaptor/adaptor_base.hpp
     include/msgpack/adaptor/adaptor_base_decl.hpp
diff --git a/README.md b/README.md
index 5f50e8864..9f6a459b6 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 `msgpack` for C++
 ===================
 
-Version 5.0.0 [![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 6.0.0 [![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://codecov.io/gh/msgpack/msgpack-c/branch/cpp_master)
 
 It's like JSON but smaller and faster.
@@ -98,7 +98,7 @@ Usage
   # ...
   find_package(msgpack REQUIRED)
   # ...
-  target_link_libraries(your_target_name <PRIVATE/PUBLIC/INTERFACE> msgpackc-cxx)
+  target_link_libraries(your_target_name <PRIVATE/PUBLIC/INTERFACE> msgpack-cxx)
   # ...
   ```
 
diff --git a/appveyor.yml b/appveyor.yml
index 5168b4410..4218f3a3d 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,4 +1,4 @@
-version: 5.0.0.{build}
+version: 6.0.0.{build}
 
 branches:
   only:
diff --git a/example/boost/CMakeLists.txt b/example/boost/CMakeLists.txt
index 10730f17d..ad9c979ce 100644
--- a/example/boost/CMakeLists.txt
+++ b/example/boost/CMakeLists.txt
@@ -21,7 +21,7 @@ FOREACH (source_file ${exec_PROGRAMS})
         ${source_file}
     )
     TARGET_LINK_LIBRARIES (${source_file_we} PRIVATE
-        msgpackc-cxx
+        msgpack-cxx
         Boost::system
         Threads::Threads
     )
diff --git a/example/cpp03/CMakeLists.txt b/example/cpp03/CMakeLists.txt
index ec36b8305..90c493f04 100644
--- a/example/cpp03/CMakeLists.txt
+++ b/example/cpp03/CMakeLists.txt
@@ -43,7 +43,7 @@ FOREACH (source_file ${exec_PROGRAMS})
         ${source_file}
     )
     TARGET_LINK_LIBRARIES (${source_file_we} PRIVATE
-        msgpackc-cxx
+        msgpack-cxx
     )
     IF ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
         SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS " -Wall -Wextra")
@@ -64,7 +64,7 @@ FOREACH (source_file ${with_pthread_PROGRAMS})
         ${source_file}
     )
     TARGET_LINK_LIBRARIES (${source_file_we} PRIVATE
-        msgpackc-cxx
+        msgpack-cxx
         Threads::Threads
     )
     IF ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
@@ -86,7 +86,7 @@ FOREACH (source_file ${with_boost_lib_PROGRAMS})
         ${source_file}
     )
     TARGET_LINK_LIBRARIES (${source_file_we} PRIVATE
-        msgpackc-cxx
+        msgpack-cxx
         Boost::timer
     )
     IF (NOT MSVC AND NOT APPLE)
diff --git a/example/cpp11/CMakeLists.txt b/example/cpp11/CMakeLists.txt
index 1f6163987..be16d118d 100644
--- a/example/cpp11/CMakeLists.txt
+++ b/example/cpp11/CMakeLists.txt
@@ -17,7 +17,7 @@ IF (MSGPACK_CXX11 OR MSGPACK_CXX14 OR MSGPACK_CXX17)
             ${source_file}
         )
         TARGET_LINK_LIBRARIES (${source_file_we} PRIVATE
-            msgpackc-cxx
+            msgpack-cxx
         )
         IF ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
             SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS " -Wall -Wextra")
diff --git a/example/x3/CMakeLists.txt b/example/x3/CMakeLists.txt
index 2b372b197..5fc6c1afa 100644
--- a/example/x3/CMakeLists.txt
+++ b/example/x3/CMakeLists.txt
@@ -15,7 +15,7 @@ IF (MSGPACK_USE_X3_PARSE AND MSGPACK_DEFAULT_API_VERSION VERSION_GREATER 1)
             ${source_file_we}
             ${source_file}
         )
-        TARGET_LINK_LIBRARIES (${source_file_we} PRIVATE msgpackc-cxx)
+        TARGET_LINK_LIBRARIES (${source_file_we} PRIVATE msgpack-cxx)
 
         IF ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
             SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS " -Wall -Wextra")
@@ -40,7 +40,7 @@ IF (MSGPACK_USE_X3_PARSE AND MSGPACK_DEFAULT_API_VERSION VERSION_GREATER 1)
             ${source_file}
         )
         TARGET_LINK_LIBRARIES (${source_file_we} PRIVATE
-            msgpackc-cxx
+            msgpack-cxx
             Boost::context
             Boost::system
             Threads::Threads
diff --git a/fuzz/CMakeLists.txt b/fuzz/CMakeLists.txt
index 120229641..819130ed2 100644
--- a/fuzz/CMakeLists.txt
+++ b/fuzz/CMakeLists.txt
@@ -16,7 +16,7 @@ FOREACH (source_file ${check_PROGRAMS})
         $<IF:$<BOOL:${MSGPACK_USE_STATIC_BOOST}>,,BOOST_TEST_DYN_LINK>)
 
     TARGET_LINK_LIBRARIES (${source_file_we}
-        msgpackc-cxx
+        msgpack-cxx
         Threads::Threads
         Boost::filesystem
         Boost::system
diff --git a/include/msgpack/version_master.hpp b/include/msgpack/version_master.hpp
index 5f40c4679..fdab08894 100644
--- a/include/msgpack/version_master.hpp
+++ b/include/msgpack/version_master.hpp
@@ -1,3 +1,3 @@
-#define MSGPACK_VERSION_MAJOR    5
+#define MSGPACK_VERSION_MAJOR    6
 #define MSGPACK_VERSION_MINOR    0
 #define MSGPACK_VERSION_REVISION 0
diff --git a/make_file_list.sh b/make_file_list.sh
index d875c4423..5156a1614 100755
--- a/make_file_list.sh
+++ b/make_file_list.sh
@@ -2,7 +2,7 @@
 
 find include -name "*.hpp" -or -name "*.h" | sed -e 's/\s\+/\n/g' | LC_ALL=C sort > cpp_headers.tmp
 
-echo 'SET (msgpackc_HEADERS' > Files.cmake
+echo 'SET (msgpack-cxx_HEADERS' > Files.cmake
 cat cpp_headers.tmp | sed -e 's/^/    /g' >> Files.cmake
 echo ')' >> Files.cmake
 
diff --git a/makedist.sh b/makedist.sh
index 67eaef9a7..9abf598ff 100755
--- a/makedist.sh
+++ b/makedist.sh
@@ -32,7 +32,7 @@ tar --append --file=$filename $prefix/ChangeLog
 tar --append --file=$filename $prefix/NEWS
 tar --append --file=$filename $prefix/COPYING
 tar --append --file=$filename $prefix/README
-tar --append --file=$filename $prefix/msgpackc-cxx-config.cmake.in
+tar --append --file=$filename $prefix/msgpack-cxx-config.cmake.in
 rm -f $prefix
 
 gzip -f $filename
diff --git a/msgpackc-cxx-config.cmake.in b/msgpack-cxx-config.cmake.in
similarity index 54%
rename from msgpackc-cxx-config.cmake.in
rename to msgpack-cxx-config.cmake.in
index 09102c6a4..74738c896 100644
--- a/msgpackc-cxx-config.cmake.in
+++ b/msgpack-cxx-config.cmake.in
@@ -6,6 +6,6 @@ IF (@MSGPACK_USE_BOOST@)
     find_dependency(Boost REQUIRED)
 ENDIF ()
 
-include("${CMAKE_CURRENT_LIST_DIR}/msgpackc-cxx-targets.cmake")
+include("${CMAKE_CURRENT_LIST_DIR}/msgpack-cxx-targets.cmake")
 
-check_required_components(msgpackc-cxx)
+check_required_components(msgpack-cxx)
diff --git a/test-install/CMakeLists.txt b/test-install/CMakeLists.txt
index e9ec3ba52..874198b61 100644
--- a/test-install/CMakeLists.txt
+++ b/test-install/CMakeLists.txt
@@ -4,7 +4,7 @@ project(test-install LANGUAGES CXX)
 
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-find_package(msgpackc-cxx REQUIRED)
+find_package(msgpack-cxx REQUIRED)
 
 add_executable(test-install simple.cpp)
-target_link_libraries(test-install PRIVATE msgpackc-cxx)
+target_link_libraries(test-install PRIVATE msgpack-cxx)
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 3e81fefd6..e0ebf2583 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -78,7 +78,7 @@ FOREACH (source_file ${check_PROGRAMS})
         $<IF:$<BOOL:${MSGPACK_USE_STATIC_BOOST}>,,BOOST_TEST_DYN_LINK>)
 
     TARGET_LINK_LIBRARIES (${source_file_we}
-        msgpackc-cxx
+        msgpack-cxx
         Boost::system
         Boost::unit_test_framework
         Threads::Threads
@@ -109,7 +109,7 @@ ADD_EXECUTABLE (
 )
 
 TARGET_LINK_LIBRARIES (multi_file
-    msgpackc-cxx
+    msgpack-cxx
 )
 
 ADD_TEST (multi_file multi_file)