diff --git a/Charpter 21/TodoList/requirements.txt b/Charpter 21/TodoList/requirements.txt
old mode 100755
new mode 100644
index 184b58f..3448f90
--- a/Charpter 21/TodoList/requirements.txt	
+++ b/Charpter 21/TodoList/requirements.txt	
@@ -40,7 +40,7 @@ pymongo==3.7.1
 PyMySQL==0.9.2
 pyOpenSSL==18.0.0
 PyWavelets==0.5.2
-pywin32==223
+pywin32==301
 queuelib==1.5.0
 redis==2.10.6
 requests==2.19.1