diff --git a/deep-learning/udacity-deeplearning/sentiment-network/requirements.txt b/deep-learning/udacity-deeplearning/sentiment-network/requirements.txt
old mode 100755
new mode 100644
index ce83403ac..a10fc249e
--- a/deep-learning/udacity-deeplearning/sentiment-network/requirements.txt
+++ b/deep-learning/udacity-deeplearning/sentiment-network/requirements.txt
@@ -16,7 +16,7 @@ jupyter-client==5.0.0
 jupyter-console==5.1.0
 jupyter-core==4.3.0
 MarkupSafe==1.0
-mistune==0.7.4
+mistune==2.0.3
 nbconvert==5.1.1
 nbformat==4.3.0
 notebook==4.4.1