diff --git a/README.md b/README.md
index 306c28c..5e867e2 100644
--- a/README.md
+++ b/README.md
@@ -82,9 +82,9 @@ Alternatively, on Linux, you can try using the IP `172.17.0.1`.
 
 ### Home Assistant
 
-If you happen to be using Home Assistant, here's how you might request
-wake-on-lan of a remote server via wake-on-lan-service. This example is of an
-automation action in your Home Assistant configuration:
+If you happen to be using Home Assistant in Docker, here's how you might
+request wake-on-lan of a remote server via wake-on-lan-service. This example
+is of an automation action in your Home Assistant configuration:
 
 ```
 automation:
@@ -94,9 +94,12 @@ automation:
       - service: shell_command.wake_my_server
 
 shell_command:
-  wake_my_server: "echo 00:00:0a:bb:28:fc | nc -N host.docker.internal 18888"
+  wake_my_server: "echo 00:00:0a:bb:28:fc | nc host.docker.internal 18888"
 ```
 
+(Home Assistant's Docker image includes netcat from busybox instead of OpenBSD
+netcat, so omit the `-N` flag.)
+
 
 ## Security
 
diff --git a/push.sh b/push.sh
index 6863666..aed71c6 100755
--- a/push.sh
+++ b/push.sh
@@ -8,5 +8,5 @@ sudo docker buildx build -t $IMAGE:amd64 .
 sudo docker push $IMAGE:amd64
 sudo docker buildx build --platform linux/arm/v7 --build-arg IMAGE_PREFIX="arm32v7/" -t $IMAGE:armv7 .
 sudo docker push $IMAGE:armv7
-sudo docker manifest create $IMAGE:latest $IMAGE:amd64 $IMAGE:armv7
+sudo docker manifest create --amend $IMAGE:latest $IMAGE:amd64 $IMAGE:armv7
 sudo docker manifest push $IMAGE:latest