diff --git a/src/common/conf.rs b/src/common/conf.rs
index 3af4bae..af19358 100644
--- a/src/common/conf.rs
+++ b/src/common/conf.rs
@@ -9,7 +9,7 @@ const DEFAULT_WIN_AFTER: usize = 20;
 #[derive(Debug, Clone, Copy)]
 pub enum Mode {
     Tcp,
-    Tls
+    Tls,
 }
 
 impl ValueEnum for Mode {