diff --git a/.github/workflows/smtp_proxy_server.yml b/.github/workflows/smtp_proxy_server.yml
index 71b44972..1a2d7f66 100644
--- a/.github/workflows/smtp_proxy_server.yml
+++ b/.github/workflows/smtp_proxy_server.yml
@@ -30,6 +30,9 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -38,6 +41,7 @@ jobs:
         with:
           context: ./smtp_proxy_server
           file: ./smtp_proxy_server/dockerfile
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: |
             ${{ env.REGISTRY }}/${{ github.repository }}/${{ env.IMAGE_NAME }}:${{ github.ref_name }}
diff --git a/smtp_proxy_server/server.py b/smtp_proxy_server/server.py
index 0267da8d..9e707911 100644
--- a/smtp_proxy_server/server.py
+++ b/smtp_proxy_server/server.py
@@ -122,6 +122,7 @@ settings = Settings()
 handler = CustomSMTPHandler()
 server = Controller(
     handler,
+    hostname="",
     port=settings.port,
     auth_require_tls=False,
     decode_data=True,