diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 51703768..2b4380ee 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -3,6 +3,28 @@ name: build
 on: [push, pull_request]
 
 jobs:
+  build-windows:
+    strategy:
+      matrix:
+        host: [i686-w64-mingw32, x86_64-w64-mingw32]
+    runs-on: ubuntu-22.04
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Build aria2
+        run: |
+          docker build --build-arg HOST=${{ matrix.host }} -t aria2-mingw -f ./Dockerfile.mingw .
+          docker run --rm -v .:/out aria2-mingw cp /aria2/src/aria2c.exe /out
+
+      - name: Upload build artifact
+        uses: actions/upload-artifact@v4.3.1
+        with:
+          name: aria2-${{ matrix.host }}
+          path: ./aria2c.exe
+  
+
   build:
     strategy:
       matrix:
@@ -19,7 +41,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4.1.1
     - name: Linux setup
       if: runner.os == 'Linux'
       run: |
diff --git a/Dockerfile.mingw b/Dockerfile.mingw
index 1c09b775..86e47414 100644
--- a/Dockerfile.mingw
+++ b/Dockerfile.mingw
@@ -30,7 +30,7 @@ RUN apt-get update && \
         autopoint libcppunit-dev libxml2-dev libgcrypt20-dev lzip \
         python3-docutils
 
-RUN curl -L -O https://gmplib.org/download/gmp/gmp-6.3.0.tar.xz && \
+RUN curl -L -O https://ftp.gnu.org/gnu/gmp/gmp-6.3.0.tar.xz && \
     curl -L -O https://github.com/libexpat/libexpat/releases/download/R_2_6_0/expat-2.6.0.tar.bz2 && \
     curl -L -O https://www.sqlite.org/2024/sqlite-autoconf-3450100.tar.gz && \
     curl -L -O https://github.com/madler/zlib/releases/download/v1.3.1/zlib-1.3.1.tar.gz && \