diff --git a/lesson01/wangshukang/devops2020/requirements.txt b/lesson01/wangshukang/devops2020/requirements.txt
index 64c0848..d126921 100644
--- a/lesson01/wangshukang/devops2020/requirements.txt
+++ b/lesson01/wangshukang/devops2020/requirements.txt
@@ -1,4 +1,4 @@
-Django==2.2
+Django==2.2.28
 mysqlclient==2.0.1
 PyMySQL==0.9.3
 pytz==2020.1