diff --git a/appveyor.yml b/appveyor.yml
index ebbbe3a..67865c9 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -70,7 +70,7 @@ build_script:
   # Windows only
   - cmd: set VCPKG_DEFAULT_TRIPLET=x64-windows
   - cmd: cmake .. -DCMAKE_TOOLCHAIN_FILE=C:/Tools/vcpkg/scripts/buildsystems/vcpkg.cmake -DCMAKE_GENERATOR_PLATFORM=x64 -DCMAKE_POLICY_DEFAULT_CMP0074=NEW -DHDF5_ROOT="C:/Tools/vcpkg/installed/x64-windows" -DHDF5_INCLUDE_DIRS="C:/Tools/vcpkg/installed/x64-windows/include" -DHDF5_LIBRARIES="hdf5::hdf5-shared" -DHDF5_HL_LIBRARIES="hdf5::hdf5_hl-shared"
-  - cmd: cmake --build . --target ALL_BUILD
+  - cmd: cmake --build . --target ALL_BUILD --config=Release
   - cmd: set PATH=%PATH%;%cd%\bin;%cd%\bin\Release;%cd%\bin\Debug
   - cmd: echo %PATH%
   # - cmd: cd ..
@@ -83,7 +83,7 @@ build_script:
   - cmd: mkdir build
   - cmd: cd build
   - cmd: cmake -DTESTS=ON .. -DCMAKE_TOOLCHAIN_FILE=C:/Tools/vcpkg/scripts/buildsystems/vcpkg.cmake -DCMAKE_GENERATOR_PLATFORM=x64 -DCMAKE_POLICY_DEFAULT_CMP0074=NEW -DHDF5_ROOT="C:/Tools/vcpkg/installed/x64-windows" -DHDF5_INCLUDE_DIRS="C:/Tools/vcpkg/installed/x64-windows/include" -DHDF5_LIBRARIES="hdf5::hdf5-shared" -DHDF5_HL_LIBRARIES="hdf5::hdf5_hl-shared"
-  - cmd: cmake --build . --target ALL_BUILD
+  - cmd: cmake --build . --target ALL_BUILD --config=Release
   - cmd: cmake --build . --target RUN_TESTS
   # Linux only
     # build without tests