How to increase max connection on play with akka stream

Thank you for answer @marcospereira

I run on PROD mode and Play’s version is 2.6.12.

Additionally, I config reference.conf like this

akka {
  http {
    server {
      backlog = 1000
      max-connections = 4096
    }

    client {
      connecting-timeout = 200ms
      idle-timeout = 500ms
    }

    host-connection-pool {
      max-connections = 16
      max-retries = 0
    }
  }
}