diff --git a/README.md b/README.md
index e1d0d10..b3fbef7 100644
--- a/README.md
+++ b/README.md
@@ -383,15 +383,8 @@ ORDER BY created_at ASC;
 业务线程仅负责将日志通过 `MPSC Channel` 发送，由独立的后台协程负责实际的 I/O 写入，从而实现 **Zero-Blocking**（零阻塞）的业务性能。
 
 ```mermaid
-classDiagram
-    class LogLevel {
-        <<enumeration>>
-        DEBUG
-        INFO
-        WARNING
-        ERROR
-        FATAL
-    }
+graph TD
+    A[Start] --> B[End]
 ```
 
 </details>
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