diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 319f5a3..988cb2b
--- a/requirements.txt
+++ b/requirements.txt
@@ -147,7 +147,7 @@ nbconvert==5.4.0
 nbformat==4.4.0
 networkx==2.2
 nltk==3.4
-notebook==5.7.2
+notebook==6.4.12
 numpy==1.17.2
 oauth2client==4.1.3
 oauthlib==2.1.0