diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index e46d498c..e3db9fc2
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,7 +42,7 @@ mistune==0.8.4
 more-itertools==8.0.2
 nbconvert==5.6.1
 nbformat==4.4.0
-notebook==6.0.2
+notebook==6.4.1
 numpy==1.17.4
 oauthlib==3.1.0
 opt-einsum==3.1.0