diff --git a/Configuration.md b/Configuration.md
index a8820d2..fc7b3c3 100644
--- a/Configuration.md
+++ b/Configuration.md
@@ -196,6 +196,7 @@ Settings are stored in [YAML format](https://en.wikipedia.org/wiki/YAML), possib
      * `parental_cache_size` — Parental Control cache size (in bytes)
      * `cache_time` — Safe Browsing, Safe Search, Parental Control cache TTL
      * `max_goroutines` — Max. number of parallel goroutines for processing incoming requests
+     * `ipset` — List of domain-ipset_name associations for adding IP addresses of the specified domain names to an ipset list.  Syntax: `DOMAIN[,DOMAIN].../IPSET_NAME[,IPSET_NAME]...`.  IPv4 addresses are added to an ipset list with `ipv4` family, IPv6 addresses - to `ipv6` ipset list.  ipset list must exist.  This setting is supported on Linux only.  This feature is similar to `--ipset` in dnsmasq.
  * `filters` — List of filters, each filter has the following values:
    * `enabled` — Current filter's status (enabled/disabled).
    * `url` — URL pointing to the filter contents (filtering rules).