diff --git a/youtube_recall/README.md b/youtube_recall/README.md
index 2dfda31342a012b99cd7136ec33494a9ea2a1d3a..91aaf6cca7899fc45b7284c4998a4a4377b8e3b7 100644
--- a/youtube_recall/README.md
+++ b/youtube_recall/README.md
@@ -78,7 +78,7 @@ The fucntion of this script is as follows:
 ```
 
 For example, run the following command to accomplish data pre-processing:
-```shell
+```
 python data_processor.py --train_set_path=./data/train.txt \
                                      --output_dir=./output \
                                      --feat_appear_limit=20