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..55c31b52f
--- a/deep-learning/udacity-deeplearning/sentiment-network/requirements.txt
+++ b/deep-learning/udacity-deeplearning/sentiment-network/requirements.txt
@@ -17,7 +17,7 @@ jupyter-console==5.1.0
 jupyter-core==4.3.0
 MarkupSafe==1.0
 mistune==0.7.4
-nbconvert==5.1.1
+nbconvert==6.3.0
 nbformat==4.3.0
 notebook==4.4.1
 numpy==1.12.1