diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5d33dbb70..deac7ac12 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -22,7 +22,8 @@ jobs:
           - {os: ubuntu-22.04, cc: clang, cxx: clang++}
           - {os: macos-15, cc: clang, cxx: clang++}
           - {os: macos-14, cc: clang, cxx: clang++}
-          - {os: windows-latest, cc: gcc, cxx: g++, altname: "mingw-gcc"}
+          - {os: windows-2025, cc: gcc, cxx: g++, altname: "mingw-gcc"}
+          - {os: windows-2022, cc: gcc, cxx: g++, altname: "mingw-gcc"}
     env:
       MRUBY_CONFIG: ci/gcc-clang
       CC: ${{ matrix.cc }}