diff --git a/README.md b/README.md
index 822fe36..421601c 100644
--- a/README.md
+++ b/README.md
@@ -47,9 +47,13 @@ Every time a Docker object changes, the plugin updates the Caddyfile and trigger
 
 ## Basic usage example, using docker-compose
 ```shell
-$ docker network create caddy
+$ docker network create caddy --ipv6
 ```
 
+> [!NOTE]
+> The `--ipv6` flag instructs Docker to assign IPv6 addresses for all containers connected to this network.
+> Without this flag, Caddy (as well as any upstream services) will see Docker's gateway IP address instead of the actual client IP addresses for IPv6 clients.
+
 `caddy/docker-compose.yml`
 ```yml
 version: "3.7"