diff --git a/docs/README.md b/docs/README.md
index 7aab19f..b8fe176 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -89,7 +89,7 @@ PDF版本是全书初稿，人民邮电出版社的编辑老师们对初稿进
 王琦，杨毅远，江季，Easy RL：强化学习教程，人民邮电出版社，https://github.com/datawhalechina/easy-rl, 2022.
 ```
 
-```
+```bibtex
 @book{wang2022easyrl,
 title = {Easy RL：强化学习教程},
 publisher = {人民邮电出版社},