diff --git a/.ci/Dockerfile.2019 b/.ci/Dockerfile.2019
deleted file mode 100644
index 3e986ce..0000000
--- a/.ci/Dockerfile.2019
+++ /dev/null
@@ -1,13 +0,0 @@
-FROM mcr.microsoft.com/windows/servercore:ltsc2019
-
-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 02b39ab..2d308ad 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -90,7 +90,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        image: [2019, 2022, 2025]
+        image: [2022, 2025]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -128,7 +128,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        image: [2019, 2022, 2025]
+        image: [2022, 2025]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -163,7 +163,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        image: [2019, 2022, 2025, 11-arm]
+        image: [2022, 2025, 11-arm]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4