diff --git a/docs/CONFIG_PARAMS.en.md b/docs/CONFIG_PARAMS.en.md
index 90da08a..3916c9d 100644
--- a/docs/CONFIG_PARAMS.en.md
+++ b/docs/CONFIG_PARAMS.en.md
@@ -20,7 +20,7 @@ This document lists all configuration keys accepted by `config.toml`.
 | Parameter | Type | Default | Constraints / validation | Description |
 |---|---|---|---|---|
 | data_path | `String \| null` | `null` | — | Optional runtime data directory path. |
-| prefer_ipv6 | `bool` | `false` | — | Prefer IPv6 where applicable in runtime logic. |
+| prefer_ipv6 | `bool` | `false` | Deprecated. Use `network.prefer`. | Deprecated legacy IPv6 preference flag migrated to `network.prefer`. |
 | fast_mode | `bool` | `true` | — | Enables fast-path optimizations for traffic processing. |
 | use_middle_proxy | `bool` | `true` | none | Enables ME transport mode; if `false`, runtime falls back to direct DC routing. |
 | proxy_secret_path | `String \| null` | `"proxy-secret"` | Path may be `null`. | Path to Telegram infrastructure proxy-secret file used by ME handshake logic. |
@@ -226,7 +226,7 @@ This document lists all configuration keys accepted by `config.toml`.
 |---|---|---|---|---|
 | ip | `IpAddr` | — | — | Listener bind IP. |
 | announce | `String \| null` | — | — | Public IP/domain announced in proxy links (priority over `announce_ip`). |
-| announce_ip | `IpAddr \| null` | — | — | Deprecated legacy announce IP (migrated to `announce` if needed). |
+| announce_ip | `IpAddr \| null` | — | Deprecated. Use `announce`. | Deprecated legacy announce IP (migrated to `announce` if needed). |
 | proxy_protocol | `bool \| null` | `null` | — | Per-listener override for PROXY protocol enable flag. |
 | reuse_allow | `bool` | `false` | — | Enables `SO_REUSEPORT` for multi-instance bind sharing. |