diff --git a/README.md b/README.md
index 2a969e8..ea8352b 100644
--- a/README.md
+++ b/README.md
@@ -150,6 +150,15 @@ log what it's doing:
 ```elixir
 config :bypass, enable_debug_log: true
 ```
+Set `:listen_ip` to override the default behaviour of ranch_tcp and limit the
+range of interfaces it will listen on to just the configured interface. Loopback
+is the default interface (127.0.0.1).
+
+Example to listen on all interfaces
+
+```elixir
+config :bypass, listen_ip: "0.0.0.0"
+```
 
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