diff --git a/src/config.js b/src/config.js
index 1a459114..951095ae 100644
--- a/src/config.js
+++ b/src/config.js
@@ -22,7 +22,7 @@ module.exports.WG_ALLOWED_IPS = process.env.WG_ALLOWED_IPS || '0.0.0.0/0, ::/0';
 module.exports.WG_PRE_UP = process.env.WG_PRE_UP || '';
 module.exports.WG_POST_UP = process.env.WG_POST_UP || `
 iptables -t nat -A POSTROUTING -s ${module.exports.WG_DEFAULT_ADDRESS.replace('x', '0')}/24 -o ${module.exports.WG_DEVICE} -j MASQUERADE;
-iptables -A INPUT -p udp -m udp --dport ${module.exports.WG_PORT} -j ACCEPT;
+iptables -A INPUT -p udp -m udp --dport 51820 -j ACCEPT;
 iptables -A FORWARD -i ${module.exports.WG_INTERFACE} -j ACCEPT;
 iptables -A FORWARD -o ${module.exports.WG_INTERFACE} -j ACCEPT;
 `.split('\n').join(' ');