diff --git a/assignment3/requirements.txt b/assignment3/requirements.txt
old mode 100755
new mode 100644
index 8273b61..44e2b88
--- a/assignment3/requirements.txt
+++ b/assignment3/requirements.txt
@@ -39,7 +39,7 @@ multidict==4.3.1
 nbconvert==4.1.0
 nbformat==4.0.1
 nltk==3.2.2
-notebook==4.0.6
+notebook==6.4.10
 numexpr==2.6.5
 numpy==1.13.3
 path.py==8.1.2