diff --git a/.appveyor.yml b/.appveyor.yml
deleted file mode 100644
index e7f6d12..0000000
--- a/.appveyor.yml
+++ /dev/null
@@ -1,60 +0,0 @@
-image:
-    - Visual Studio 2019
-    - Visual Studio 2022
-
-init:
-    - git config --global core.autocrlf input
-
-clone_folder: c:\projects\cc_mqttsn
-shallow_clone: true             
-
-platform:
-    - x64
-    - x86
-
-configuration:
-    - Debug
-    - Release
-
-environment:
-    COMMS_TAG: v5.2.3
-    CC_MQTTSN_TAG: v2.7
-    CC_MQTT311_TAG: v2.7
-
-    matrix:
-        - CPP_STD: 17
-        - CPP_STD: 20
-
-matrix:
-    fast_finish: false
-    exclude:
-        - image: Visual Studio 2019
-          CPP_STD: 20         
-
-install:
-    - call script\appveyor_install.bat
-    - set PATH=%PATH%;%QTDIR%\bin
-    - set BUILD_DIR=%APPVEYOR_BUILD_FOLDER%\build.%PLATFORM%.%CONFIGURATION%.%TOOLCHAIN%
-    - if exist %BUILD_DIR% rmdir /S /Q %BUILD_DIR%
-    - set COMMS_TAG=%COMMS_TAG%
-    - set CC_MQTTSN_TAG=%CC_MQTTSN_TAG%
-    - set CC_MQTT311_TAG=%CC_MQTT311_TAG%
-    - set COMMON_INSTALL_DIR=%BUILD_DIR%\install
-    - set COMMON_BUILD_TYPE=%CONFIGURATION%
-    - set COMMON_CXX_STANDARD=%CPP_STD%
-    - set GENERATOR="%CMAKE_GENERATOR%"
-    - set PLATFORM="%CMAKE_PLATFORM%"    
-    - call script\prepare_externals.bat    
-
-build_script:
-    - echo ------------------------- Building Project -------------------------
-    - cd %BUILD_DIR%
-    - cmake .. -DCMAKE_BUILD_TYPE=%CONFIGURATION% -G "%CMAKE_GENERATOR%" %PLATFORM_PARAM% -DCMAKE_INSTALL_PREFIX=install ^
-        -DCMAKE_CXX_STANDARD=%CPP_STD% -DCMAKE_PREFIX_PATH="%COMMON_INSTALL_DIR%" ^
-        -DCC_MQTTSN_BUILD_UNIT_TESTS=ON
-    - cmake --build . --config %CONFIGURATION% --target install --parallel %NUMBER_OF_PROCESSORS%
-
-test_script:
-    - echo ------------------------- Testing -------------------------
-    - ctest -V
-
diff --git a/script/appveyor_install.bat b/script/appveyor_install.bat
deleted file mode 100644
index 5496519..0000000
--- a/script/appveyor_install.bat
+++ /dev/null
@@ -1,72 +0,0 @@
-IF "%APPVEYOR_BUILD_WORKER_IMAGE%"=="Visual Studio 2015" (
-    set TOOLCHAIN=msvc14
-    set QT_SUBDIR=msvc2015
-    set QT_VER=5.6
-    set CMAKE_GENERATOR=NMake Makefiles
-    IF "%PLATFORM%"=="x86" (
-        echo Performing x86 build in VS2015
-        call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x86
-    ) ELSE (
-        echo Performing amd64 build in VS2015
-        call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" amd64
-    )
-) ELSE IF "%APPVEYOR_BUILD_WORKER_IMAGE%"=="Visual Studio 2017" (
-    set TOOLCHAIN=msvc15
-    set QT_SUBDIR=msvc2017
-    set QT_VER=5.13
-    set CMAKE_GENERATOR=NMake Makefiles
-    IF "%PLATFORM%"=="x86" (
-        echo Performing x86 build in VS2017
-        call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars32.bat"
-    ) ELSE (
-        echo Performing amd64 build in VS2017
-        call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars64.bat"
-    )
-    
-) ELSE IF "%APPVEYOR_BUILD_WORKER_IMAGE%"=="Visual Studio 2019" (
-    set TOOLCHAIN=msvc16
-    set QT_SUBDIR=msvc2019
-    set QT_VER=5.15
-    set CMAKE_GENERATOR=Visual Studio 16 2019
-    IF "%PLATFORM%"=="x86" (
-        echo Performing x86 build in VS2019
-        call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars32.bat"
-        set CMAKE_PLATFORM=Win32
-    ) ELSE (
-        echo Performing amd64 build in VS2019
-        call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat"
-        set CMAKE_PLATFORM=x64
-    )
-) ELSE IF "%APPVEYOR_BUILD_WORKER_IMAGE%"=="Visual Studio 2022" (
-    set TOOLCHAIN=msvc17
-    set QT_SUBDIR=msvc2019
-    set QT_VER=5.15
-    set CMAKE_GENERATOR=Visual Studio 17 2022
-    IF "%PLATFORM%"=="x86" (
-        echo Performing x86 build in VS2022
-        call "C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\vcvars32.bat"
-        set CMAKE_PLATFORM=Win32
-    ) ELSE (
-        echo Performing amd64 build in VS2022
-        call "C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\vcvars64.bat"
-        set CMAKE_PLATFORM=x64
-    )  
-) ELSE (
-    echo Toolchain %TOOLCHAIN% is not supported
-    exit -1
-)
-
-set QTDIR_PREFIX=C:/Qt/%QT_VER%
-IF "%PLATFORM%"=="x86" (
-    set QTDIR_SUFFIX=
-) ELSE (
-    set QTDIR_SUFFIX=_64
-)
-
-set QTDIR=%QTDIR_PREFIX%/%QT_SUBDIR%%QTDIR_SUFFIX%
-IF NOT EXIST %QTDIR% (
-    echo WARNING: %QTDIR% does not exist!
-    set QTDIR=%QTDIR_PREFIX%/msvc2015%QTDIR_SUFFIX%
-)
-
-echo Using Qt from %QTDIR%