Can't start nginx with elasticsearch running

We are running into the following issue when we try to run nginx after es is already up & running:

nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)

If we start nginx THEN es then everything works. How do I resolve this? We can't always choose the order of services started given we use supervisor.

thx!

Elasticsearch doesn't bind to port 80 with the default settings. Either it's something else hogging the port or you yourself have configured ES to use that port.