diff --git a/.ci/Dockerfile.2025 b/.ci/Dockerfile.2025
new file mode 100644
index 0000000..d1cf102
--- /dev/null
+++ b/.ci/Dockerfile.2025
@@ -0,0 +1,13 @@
+FROM mcr.microsoft.com/windows/servercore:ltsc2025
+
+COPY ./msys2-base-x86_64-latest.sfx.exe /msys2.exe
+
+RUN powershell -Command \
+  $ErrorActionPreference = 'Stop'; \
+  $ProgressPreference = 'SilentlyContinue'; \
+  /msys2.exe -y -oC:\; \
+  function msys() { C:\msys64\usr\bin\bash.exe @('-lc') + @Args; } \
+  msys ' '; \
+  msys 'pacman --noconfirm -Syuu'; \
+  msys 'pacman --noconfirm -Syuu'; \
+  msys 'pacman --noconfirm -Scc';
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b7ec54b..45786d7 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -11,7 +11,7 @@ concurrency: nope
 
 jobs:
   build-installer:
-    runs-on: windows-2022
+    runs-on: windows-2025
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -70,7 +70,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        image: [2019, 2022]
+        image: [2019, 2022, 2025]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -108,7 +108,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        image: [2019, 2022]
+        image: [2019, 2022, 2025]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -143,7 +143,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        image: [2019, 2022]
+        image: [2019, 2022, 2025]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4