diff --git a/Workers.md b/Workers.md
index 95ffa0f..a5690ec 100644
--- a/Workers.md
+++ b/Workers.md
@@ -2,4 +2,6 @@ Shadowsocks supports `--workers` to spawn child processes like nginx.
 
 You can use --workers to specify how many workers to use.
 
-This argument is only supported on Unix and ssserver.
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+This argument is only supported on Unix and ssserver.
+
+Currently UDP relay does not work well on multiple workers.
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