diff --git a/src/main.rs b/src/main.rs
index 2351819..28c775e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -21,8 +21,8 @@ struct TcpClientConfig {
 
 #[derive(Serialize, Deserialize, Debug, Clone)]
 struct UdpConfig {
-    bind_addr: String,
-    forward_addr: Option<String>,
+    bind_addr: std::net::SocketAddrV4,
+    forward_addr: Option<std::net::SocketAddrV4>,
 }
 
 #[derive(Serialize, Deserialize, Debug, Clone)]