diff --git a/docs/source/en/basics/config.md b/docs/source/en/basics/config.md
index 7e39255028..d3e54242cd 100644
--- a/docs/source/en/basics/config.md
+++ b/docs/source/en/basics/config.md
@@ -115,7 +115,7 @@ extend(true, a, b);
 ```
 As demonstrated above, the framework will overwrite arrays instead of merging them.
 
-## Configuration result
+### Configuration result
 
 The final merged config will be dumped to `run/application_config.json`(for worker process) and `run/agent_config.json`(for agent process) when the framework started, which can help analyzing problems.
 
diff --git a/docs/source/zh-cn/basics/config.md b/docs/source/zh-cn/basics/config.md
index ea9a55a013..d32c431565 100644
--- a/docs/source/zh-cn/basics/config.md
+++ b/docs/source/zh-cn/basics/config.md
@@ -122,7 +122,7 @@ extend(true, a, b);
 
 根据上面的例子，框架直接覆盖数组而不是进行合并。
 
-## 配置结果
+### 配置结果
 
 框架在启动时会把合并后的最终配置 dump 到 `run/application_config.json`（worker 进程）和 `run/agent_config.json`（agent 进程）中，可以用来分析问题。