diff --git a/1 Predicting Bike-Sharing Patterns/requirements.txt b/1 Predicting Bike-Sharing Patterns/requirements.txt
old mode 100755
new mode 100644
index aac831f..c2a9776
--- a/1 Predicting Bike-Sharing Patterns/requirements.txt	
+++ b/1 Predicting Bike-Sharing Patterns/requirements.txt	
@@ -17,7 +17,7 @@ jupyter-console==5.1.0
 jupyter-core==4.3.0
 MarkupSafe==1.0
 matplotlib==2.0.0
-mistune==0.7.4
+mistune==2.0.3
 nbconvert==5.1.1
 nbformat==4.3.0
 notebook==4.4.1