diff --git a/sub2/backend/requirements.txt b/sub2/backend/requirements.txt
index 0a4688b..32cde38 100644
--- a/sub2/backend/requirements.txt
+++ b/sub2/backend/requirements.txt
@@ -43,7 +43,7 @@ nbformat==4.4.0
 networkx==2.2
 nltk==3.4
 nose==1.3.7
-notebook==5.7.8
+notebook==6.1.5
 numba==0.42.0
 numexpr==2.6.9
 numpy==1.16.2