diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index dc89a7ef..61ff8a1f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,8 +1,30 @@
 name: build
 
-on: [push, pull_request]
+on: [push, pull_request, workflow_dispatch]
 
 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:
@@ -100,3 +122,10 @@ jobs:
     - name: Build aria2
       run: |
         make -j"$(nproc 2> /dev/null || sysctl -n hw.ncpu)" check
+        strip ./src/aria2c
+        
+    - name: Upload build artifact
+      uses: actions/upload-artifact@v4.3.1
+      with:
+        name: aria2-${{ matrix.os }}-${{ matrix.compiler }}-${{ matrix.crypto }}-${{ matrix.bittorrent }}
+        path: ./src/aria2c
diff --git a/Dockerfile.mingw b/Dockerfile.mingw
index c140b306..9337b870 100644
--- a/Dockerfile.mingw
+++ b/Dockerfile.mingw
@@ -1,7 +1,8 @@
 # Dockerfile to build aria2 Windows binary using ubuntu mingw-w64
 # cross compiler chain.
 #
-# $ sudo docker build -t aria2-mingw - < Dockerfile.mingw
+# $ sudo docker build -t aria2-mingw -f Dockerfile.mingw .
+# Be aware that there's a dot at the end of the command  ↑
 #
 # After successful build, windows binary is located at
 # /aria2/src/aria2c.exe.  You can copy the binary using following
@@ -25,15 +26,15 @@ RUN apt-get update && \
     apt-get install -y --no-install-recommends \
         make binutils autoconf automake autotools-dev libtool \
         patch ca-certificates \
-        pkg-config git curl dpkg-dev gcc-mingw-w64 g++-mingw-w64 \
+        pkg-config git curl dpkg-dev mingw-w64 \
         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 && \
-    curl -L -O https://github.com/libexpat/libexpat/releases/download/R_2_5_0/expat-2.5.0.tar.bz2 && \
-    curl -L -O https://www.sqlite.org/2023/sqlite-autoconf-3430100.tar.gz && \
+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 && \
-    curl -L -O https://github.com/c-ares/c-ares/releases/download/cares-1_19_1/c-ares-1.19.1.tar.gz && \
+    curl -L -O https://github.com/c-ares/c-ares/releases/download/v1.30.0/c-ares-1.30.0.tar.gz && \
     curl -L -O https://libssh2.org/download/libssh2-1.11.0.tar.bz2
 
 RUN tar xf gmp-6.3.0.tar.xz && \
@@ -48,8 +49,8 @@ RUN tar xf gmp-6.3.0.tar.xz && \
         CFLAGS="-mtune=generic -O2 -g0" && \
     make -j$(nproc) install
 
-RUN tar xf expat-2.5.0.tar.bz2 && \
-    cd expat-2.5.0 && \
+RUN tar xf expat-2.6.0.tar.bz2 && \
+    cd expat-2.6.0 && \
     ./configure \
         --disable-shared \
         --enable-static \
@@ -58,8 +59,8 @@ RUN tar xf expat-2.5.0.tar.bz2 && \
         --build=`dpkg-architecture -qDEB_BUILD_GNU_TYPE` && \
     make -j$(nproc) install
 
-RUN tar xf sqlite-autoconf-3430100.tar.gz && \
-    cd sqlite-autoconf-3430100 && \
+RUN tar xf sqlite-autoconf-3450100.tar.gz && \
+    cd sqlite-autoconf-3450100 && \
     ./configure \
         --disable-shared \
         --enable-static \
@@ -82,8 +83,8 @@ RUN tar xf zlib-1.3.1.tar.gz && \
         --static && \
     make -j$(nproc) install
 
-RUN tar xf c-ares-1.19.1.tar.gz && \
-    cd c-ares-1.19.1 && \
+RUN tar xf c-ares-1.30.0.tar.gz && \
+    cd c-ares-1.30.0 && \
     ./configure \
         --disable-shared \
         --enable-static \
@@ -105,10 +106,7 @@ RUN tar xf libssh2-1.11.0.tar.bz2 && \
         LIBS="-lws2_32" && \
     make -j$(nproc) install
 
-ARG ARIA2_VERSION=master
-ARG ARIA2_REF=refs/heads/master
+COPY . /aria2
 
-ADD https://api.github.com/repos/aria2/aria2/git/$ARIA2_REF version.json
-RUN git clone -b $ARIA2_VERSION --depth 1 https://github.com/aria2/aria2 && \
-    cd aria2 && autoreconf -i && ./mingw-config && make -j$(nproc) && \
+RUN cd aria2 && autoreconf -i && ./mingw-config && make -j$(nproc) && \
     $HOST-strip src/aria2c.exe
diff --git a/mingw-config b/mingw-config
index c903c0b6..1f99a6bf 100755
--- a/mingw-config
+++ b/mingw-config
@@ -76,7 +76,7 @@ test -z "$PREFIX" && PREFIX=/usr/local/$HOST
     --without-libnettle \
     --with-cppunit-prefix=$PREFIX \
     ARIA2_STATIC=yes \
-    CPPFLAGS="-I$PREFIX/include" \
+    CPPFLAGS="-I$PREFIX/include -DCARES_STATICLIB" \
     LDFLAGS="-L$PREFIX/lib" \
     PKG_CONFIG="/usr/bin/pkg-config" \
     PKG_CONFIG_PATH="$PREFIX/lib/pkgconfig"
diff --git a/src/OptionHandlerFactory.cc b/src/OptionHandlerFactory.cc
index 000426b6..eb474372 100644
--- a/src/OptionHandlerFactory.cc
+++ b/src/OptionHandlerFactory.cc
@@ -438,7 +438,7 @@ std::vector<OptionHandler*> OptionHandlerFactory::createOptionHandlers()
   {
     OptionHandler* op(new NumberOptionHandler(PREF_MAX_CONNECTION_PER_SERVER,
                                               TEXT_MAX_CONNECTION_PER_SERVER,
-                                              "1", 1, 16, 'x'));
+                                              "16", 1, -1, 'x'));
     op->addTag(TAG_BASIC);
     op->addTag(TAG_FTP);
     op->addTag(TAG_HTTP);
@@ -499,7 +499,7 @@ std::vector<OptionHandler*> OptionHandlerFactory::createOptionHandlers()
   }
   {
     OptionHandler* op(new UnitNumberOptionHandler(
-        PREF_MIN_SPLIT_SIZE, TEXT_MIN_SPLIT_SIZE, "20M", 1_m, 1_g, 'k'));
+        PREF_MIN_SPLIT_SIZE, TEXT_MIN_SPLIT_SIZE, "1M", 1_k, 1_g, 'k'));
     op->addTag(TAG_BASIC);
     op->addTag(TAG_FTP);
     op->addTag(TAG_HTTP);