diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index d9ffe42..ac5125c 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -19,6 +19,11 @@ jobs:
         ruby: ${{ fromJson(needs.ruby-versions.outputs.versions) }}
     runs-on: windows-latest
     steps:
+    - name: git config
+      run: |
+        git config --global core.autocrlf false
+        git config --global core.eol lf
+        git config --global advice.detachedHead 0
     - uses: actions/checkout@v4
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
@@ -28,3 +33,19 @@ jobs:
     - name: Run test
       run: bundle exec rake
 
+    - id: build
+      run: |
+        bundle exec rake build
+        echo "pkg=${GITHUB_REPOSITORY#*/}" >> $GITHUB_OUTPUT
+      if: >-
+        ${{
+        github.event_name == 'push' &&
+        (matrix.ruby == needs.ruby-versions.outputs.latest)
+        }}
+      shell: bash
+    - name: Upload package
+      uses: actions/upload-artifact@v4
+      with:
+        path: pkg/*.gem
+        name: ${{steps.build.outputs.pkg}}
+      if: steps.build.outputs.pkg
diff --git a/win32ole.gemspec b/win32ole.gemspec
index 9c137a5..e9abb57 100644
--- a/win32ole.gemspec
+++ b/win32ole.gemspec
@@ -23,9 +23,11 @@ Gem::Specification.new do |spec|
   spec.metadata["homepage_uri"] = spec.homepage
   spec.metadata["source_code_uri"] = spec.homepage
 
-  spec.files         = Dir.chdir(File.expand_path('..', __FILE__)) do
-    `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
-  end
+  cmd = %W[git ls-files -z --
+    :^#{File.basename(__FILE__)}
+    :^/bin/ :^/test/ :^/rakelib/ :^/.git* :^Gemfile* :^Rakefile*
+  ]
+  spec.files = IO.popen(cmd, chdir: __dir__, err: IO::NULL, exception: false, &:read).split("\x0")
   spec.bindir        = "exe"
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]