diff --git a/Charpter 21/TodoList/requirements.txt b/Charpter 21/TodoList/requirements.txt
old mode 100755
new mode 100644
index 184b58f..c14b968
--- a/Charpter 21/TodoList/requirements.txt	
+++ b/Charpter 21/TodoList/requirements.txt	
@@ -53,7 +53,7 @@ SQLAlchemy==1.2.11
 stevedore==1.29.0
 tesserocr==2.2.2
 toolz==0.9.0
-Twisted==18.7.0
+Twisted==22.10.0
 urllib3==1.23
 virtualenv==16.0.0
 virtualenv-clone==0.3.0