diff --git a/Charpter 21/TodoList/requirements.txt b/Charpter 21/TodoList/requirements.txt
old mode 100755
new mode 100644
index 184b58f..e77b4f2
--- a/Charpter 21/TodoList/requirements.txt	
+++ b/Charpter 21/TodoList/requirements.txt	
@@ -22,7 +22,7 @@ hyperlink==18.0.0
 idna==2.7
 incremental==17.5.0
 itsdangerous==0.24
-Jinja2==2.10
+Jinja2==2.11.3
 logger==1.4
 lxml==4.2.4
 MarkupSafe==1.0