diff --git a/pkg/synology/dsm7-docker/README.md b/pkg/synology/dsm7-docker/README.md
index 14bacde76b..99cd979cff 100644
--- a/pkg/synology/dsm7-docker/README.md
+++ b/pkg/synology/dsm7-docker/README.md
@@ -1,3 +1,8 @@
 ## Docker image for Synology's DSM7
 
 Documentation: [docs.zerotier.com/devices/synology](https://docs.zerotier.com/devices/synology)
+
+### Build & Push changes to DockerHub
+```shell
+./build.sh build
+```
diff --git a/pkg/synology/dsm7-docker/build.sh b/pkg/synology/dsm7-docker/build.sh
index acec5e0c90..1706ac686b 100755
--- a/pkg/synology/dsm7-docker/build.sh
+++ b/pkg/synology/dsm7-docker/build.sh
@@ -3,19 +3,17 @@
 ZTO_VER=$(git describe --tags $(git rev-list --tags --max-count=1))
 ZTO_COMMIT=$(git rev-parse HEAD)
 
-build()
-{
-  sudo docker build --load --rm -t zerotier-synology . --build-arg ZTO_COMMIT=${ZTO_COMMIT} --build-arg ZTO_VER=${ZTO_VER}
-  LATEST_DOCKER_IMAGE_HASH=$(sudo docker images -q zerotier-synology)
-  sudo docker tag ${LATEST_DOCKER_IMAGE_HASH} zerotier/zerotier-synology:${ZTO_VER}
-  sudo docker tag ${LATEST_DOCKER_IMAGE_HASH} zerotier/zerotier-synology:latest
-}
-
-push()
-{
+build() {
   sudo docker login --username=${DOCKERHUB_USERNAME}
-  sudo docker push zerotier/zerotier-synology:${ZTO_VER}
-  sudo docker push zerotier/zerotier-synology:latest
+
+  sudo docker buildx build \
+    --push \
+    --platform linux/arm/v7,linux/arm64/v8,linux/amd64 \
+    --tag zerotier/zerotier-synology:${ZTO_VER} \
+    --tag zerotier/zerotier-synology:latest \
+    --build-arg ZTO_COMMIT=${ZTO_COMMIT} \
+    --build-arg ZTO_VER=${ZTO_VER} \
+    .
 }
 
 "$@"