diff --git a/dendronet_legacy/requirements.txt b/dendronet_legacy/requirements.txt
index cda78a0..9de1980 100644
--- a/dendronet_legacy/requirements.txt
+++ b/dendronet_legacy/requirements.txt
@@ -46,7 +46,7 @@ nbformat==4.4.0
 netifaces==0.10.4
 nose==1.3.7
 nose-parameterized==0.3.4
-notebook==5.2.2
+notebook==6.4.1
 numpy==1.13.3
 oauth==1.0.1
 olefile==0.45.1