diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d131e3a07..c563ce47e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,8 +2,11 @@ name: ci
 
 on: [ push ]
 
+env:
+  JAVA_VERSION: 21
+
 jobs:
-  build:
+  build-linux:
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -11,9 +14,6 @@ jobs:
 
     steps:
       # Checkout
-      - name: Configure git to checkout as-is
-        run: git config --global core.autocrlf false
-
       - name: Checkout
         uses: actions/checkout@v4
         with:
@@ -29,7 +29,7 @@ jobs:
       - name: Set up GraalVM
         uses: graalvm/setup-graalvm@v1
         with:
-          java-version: "21"
+          java-version: ${{ env.JAVA_VERSION }}
           distribution: "graalvm"
           cache: "maven"
 
@@ -120,9 +120,46 @@ jobs:
           images: athou/commafeed:master-native,athou/commafeed:master-jvm
           push: true
 
+  build-windows:
+    runs-on: windows-latest
+    strategy:
+      matrix:
+        database: [ "h2", "postgresql", "mysql", "mariadb" ]
+
+    steps:
+      # Checkout
+      - name: Configure git to checkout as-is
+        run: git config --global core.autocrlf false
+
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      # Setup
+      - name: Set up GraalVM
+        uses: graalvm/setup-graalvm@v1
+        with:
+          java-version: ${{ env.JAVA_VERSION }}
+          distribution: "graalvm"
+          cache: "maven"
+
+      # Build & Test
+      - name: Build with Maven
+        run: mvn --batch-mode --no-transfer-progress install -Pnative -P${{ matrix.database }} -DskipTests=${{ matrix.database != 'h2' }}
+
+      # Upload artifacts
+      - name: Upload native executable
+        uses: actions/upload-artifact@v4
+        with:
+          name: commafeed-${{ matrix.database }}-${{ runner.os }}-${{ runner.arch }}
+          path: commafeed-server/target/commafeed-*-runner.exe
+
   release:
     runs-on: ubuntu-latest
-    needs: build
+    needs:
+      - build-linux
+      - build-windows
     if: github.ref_type == 'tag'
 
     steps:
diff --git a/commafeed-server/src/test/java/com/commafeed/backend/HttpGetterTest.java b/commafeed-server/src/test/java/com/commafeed/backend/HttpGetterTest.java
index e0289599b..a10cb2a73 100644
--- a/commafeed-server/src/test/java/com/commafeed/backend/HttpGetterTest.java
+++ b/commafeed-server/src/test/java/com/commafeed/backend/HttpGetterTest.java
@@ -85,7 +85,7 @@ void validFeed() throws Exception {
 		Assertions.assertEquals(MediaType.APPLICATION_ATOM_XML.toString(), result.getContentType());
 		Assertions.assertEquals("123456", result.getLastModifiedSince());
 		Assertions.assertEquals("78910", result.getETag());
-		Assertions.assertTrue(result.getDuration() > 0);
+		Assertions.assertTrue(result.getDuration() >= 0);
 		Assertions.assertEquals(this.feedUrl, result.getUrlAfterRedirect());
 	}