SSL/TLS How to force TLS 1.2

I’m currently in the process of migrating an API from AWS to Fly. While working on this, I encountered an issue with a consumer in VB.NET. The error indicates a closed connection, which we suspect might be due to TLS 1.3 compatibility issues. Unfortunately, VB.NET supports only TLS 1.2.

  internal_port = 8080
  auto_stop_machines = false
  auto_start_machines = true
  min_machines_running = 0
  processes = ['app']

    alpn = ['h2', 'http/1.1']
    versions = ['TLSv1.2']
    default_self_signed = false

  protocol = 'tcp'
  internal_port = 8080

    port = 443
    handlers = ['tls', 'http']

      alpn = ['h2', 'http/1.1']
      versions = ['TLSv1.2']

    hard_limit = 25
    soft_limit = 20

I tried to force this in fly.toml, but I was unsuccessful.

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