diff --git a/appveyor.yml b/appveyor.yml
index ecea5c5..5dca65b 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,12 +1,14 @@
+image:
+  - Visual Studio 2019
 environment:
   CMAKE_INSTALL_ROOT: C:\projects\cmake
   ZLIB_ROOT: C:\projects\zlib
   LIBEXPAT: C:\projects\libexpat
   LIBEXIV2_ROOT: C:\projects\exiv2
   matrix:
-    - build_name: mingw73_32_qt5_12_6
-      QTPATH: C:\Qt\5.12.6\mingw73_32
-      MINGW32: C:\Qt\Tools\mingw730_32
+    - build_name: mingw81_32_qt5_15_2
+      QTPATH: C:\Qt\5.15.2\mingw81_32
+      MINGW32: C:\Qt\Tools\mingw810_32
 
 install:
   - mkdir %CMAKE_INSTALL_ROOT%
@@ -16,6 +18,8 @@ install:
   - cd %APPVEYOR_BUILD_FOLDER%
   - git submodule update --init --recursive
   - set PATH=%PATH%;%CMAKE_INSTALL_ROOT%;%QTPATH%\bin;%MINGW32%\bin
+  - set CC=%MINGW32%\bin\gcc.exe
+  - set CXX=%MINGW32%\bin\g++.exe
 
 build_script:
 # prepare
@@ -34,12 +38,22 @@ build_script:
   - curl -fsS -o zlib128-dll.zip http://zlib.net/zlib128-dll.zip
   - 7z x zlib128-dll.zip
   - cd %APPVEYOR_BUILD_FOLDER%
+# install KArchive for kra format support of KImageFormats
+  - cd 3rdparty
+  - git clone -q https://invent.kde.org/frameworks/karchive.git
+  - cd karchive
+  - mkdir build
+  - cd build
+  - cmake .. -G "Ninja" -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=%CMAKE_INSTALL_ROOT% -DCMAKE_CXX_FLAGS_RELEASE="-s" -DZLIB_ROOT=%ZLIB_ROOT% 
+  - cmake --build . --config Release
+  - cmake --build . --config Release --target install
+  - cd %APPVEYOR_BUILD_FOLDER%
 # build libexpat for libexiv2
   - cd %LIBEXPAT_ROOT%
   - curl -fsSL -o R_2_2_10.zip https://github.com/libexpat/libexpat/archive/R_2_2_10.zip
   - 7z x R_2_2_10.zip -y
   - cd libexpat-R_2_2_10/expat/
-  - cmake -G "Ninja" . -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=%CMAKE_INSTALL_ROOT% -DCMAKE_CXX_FLAGS_RELEASE="-s"
+  - cmake -G "Ninja" . -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=%CMAKE_INSTALL_ROOT% -DCMAKE_CXX_FLAGS_RELEASE="-s" -DEXPAT_BUILD_EXAMPLES=OFF -DEXPAT_BUILD_TESTS=OFF -DEXPAT_BUILD_TOOLS=OFF
   - cmake --build . --target install
   - cd %APPVEYOR_BUILD_FOLDER%
 # build libexiv2
@@ -47,20 +61,9 @@ build_script:
   - curl -fsSL -o v0.27.3.zip https://github.com/Exiv2/exiv2/archive/v0.27.3.zip
   - 7z x v0.27.3.zip -y
   - cd exiv2-0.27.3
-  - cmake -G "Ninja" . -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=%CMAKE_INSTALL_ROOT% -DEXIV2_BUILD_SAMPLES=OFF -DCMAKE_CXX_FLAGS_RELEASE="-s" -DZLIB_ROOT=%ZLIB_ROOT%
+  - cmake -G "Ninja" . -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=%CMAKE_INSTALL_ROOT% -DEXIV2_BUILD_SAMPLES=OFF -DEXIV2_ENABLE_WIN_UNICODE=ON -DCMAKE_CXX_FLAGS_RELEASE="-s" -DZLIB_ROOT=%ZLIB_ROOT%
   - cmake --build . --target install
   - cd %APPVEYOR_BUILD_FOLDER%
-# install KArchive for kra format support of KImageFormats
-  - cd 3rdparty
-  - git clone -q https://invent.kde.org/frameworks/karchive.git
-  - cd karchive
-  - mkdir build
-  - cd build
-  - cmake .. -G "Ninja" -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=%CMAKE_INSTALL_ROOT% -DCMAKE_CXX_FLAGS_RELEASE="-s" -DZLIB_ROOT=%ZLIB_ROOT%
-# -DCMAKE_PREFIX_PATH=%CMAKE_INSTALL_ROOT% 
-  - cmake --build . --config Release
-  - cmake --build . --config Release --target install
-  - cd %APPVEYOR_BUILD_FOLDER%
 # install KImageFormats
   - cd 3rdparty
   - git clone -q https://invent.kde.org/frameworks/kimageformats.git
@@ -84,7 +87,7 @@ build_script:
   - copy %CMAKE_INSTALL_ROOT%\bin\libexiv2.dll
   - copy %ZLIB_ROOT%\zlib1.dll .
   - copy C:\projects\cmake\bin\libKF5Archive.dll .
-  - windeployqt --verbose=2 --no-quick-import --no-translations --no-opengl-sw --no-angle --no-system-d3d-compiler --release .\ppic.exe
+  - windeployqt --verbose=2 --no-quick-import --no-translations --no-opengl-sw --no-angle --no-system-d3d-compiler .\ppic.exe
 # for debug..
   - tree /f