diff --git a/wg-easy.service b/wg-easy.service
index bcdf72fd..e8bc2c91 100644
--- a/wg-easy.service
+++ b/wg-easy.service
@@ -10,6 +10,7 @@ Environment="PASSWORD=REPLACEME" # When set, requires a password when logging in
 #Environment="WG_ALLOWED_IPS=0.0.0.0/0,::/0" #Allowed IPs clients will use.
 #Environment="WG_DEVICE=ens1" #Ethernet device the wireguard traffic should be forwarded through.
 #Environment="PORT=80" #TCP port for Web UI. Default : 51821
+#Environment="PROMETHEUS_METRICS_PORT=9586" #TCP port for Prometheus metrics. Default : 9586
 #Environment="WG_MTU=1420" #The MTU the clients will use. Server uses default WG MTU
 #Environment="WG_PERSISTENT_KEEPALIVE=25" #Value in seconds to keep the "connection" open. If this value is 0, then connections won't be kept alive.
 Type=simple