diff --git a/appveyor.sh b/appveyor.sh
index eed6295349..8852caec9b 100644
--- a/appveyor.sh
+++ b/appveyor.sh
@@ -59,7 +59,7 @@ if [ -n "${CMAKE_GENERATOR:-}" ]; then
       fn="cmake-${CMAKE_VERSION}-win64-x64"
     fi
     curl --disable --fail --silent --show-error --connect-timeout 15 --max-time 60 --retry 3 --retry-connrefused \
-      --location "https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/${fn}.zip" --output pkg.bin
+      --location --proto-redir =https "https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/${fn}.zip" --output pkg.bin
     sha256sum pkg.bin && sha256sum pkg.bin | grep -qwF -- "${CMAKE_SHA256}" && 7z x -y pkg.bin >/dev/null && rm -f pkg.bin
     PATH="$PWD/${fn}/bin:$PATH"
   fi