diff --git a/README.md b/README.md
index 4c2b2cf..953cefc 100644
--- a/README.md
+++ b/README.md
@@ -76,6 +76,7 @@ These options can be configured in `docker-compose.yml` under `environment`.
 | `WG_HOST` | - | `vpn.myserver.com` | The public hostname of your VPN server |
 | `WEBHOST` | - | `0.0.0.0` | IP where the web server listens
 | `WG_PORT` | `51820` | `51820` | The public UDP port of your VPN server |
+| `WG_PERSISTENTKEEPALIVE` | `25` | `60` | Value in seconds to keep the "connection" open |
 | `WG_DEFAULT_ADDRESS` | `10.8.0.x` | `10.6.0.x` | Clients IP address range |
 | `WG_DEFAULT_DNS` | `1.1.1.1` | `8.8.8.8, 8.8.4.4` | DNS server clients will use |
 | `WG_ALLOWED_IPS` | `0.0.0.0/0, ::/0` | `192.168.15.0/24, 10.0.1.0/24` | Allowed IPs clients will use |