diff --git a/examples/rolling_process_data/README.md b/examples/rolling_process_data/README.md
index b04f5ed7f..c84eaac20 100644
--- a/examples/rolling_process_data/README.md
+++ b/examples/rolling_process_data/README.md
@@ -9,7 +9,7 @@ When rolling train the models, data also needs to be generated in the different
 In order to avoid regenerating data, this example uses the `DataHandler-based DataLoader` to load the raw features that are not related to the rolling window, and then used Processors to generate processed-features related to the sliding window.
 
 
-### Run the Code
+## Run the Code
 
 Run the example by running the following command:
 ```bash