diff --git a/deep-learning/udacity-deeplearning/weight-initialization/requirements.txt b/deep-learning/udacity-deeplearning/weight-initialization/requirements.txt
old mode 100755
new mode 100644
index 3fc4d5599..11d9c8f1c
--- a/deep-learning/udacity-deeplearning/weight-initialization/requirements.txt
+++ b/deep-learning/udacity-deeplearning/weight-initialization/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==0.8.1
 nbconvert==5.1.1
 nbformat==4.3.0
 notebook==4.4.1