diff --git a/requirements.txt b/requirements.txt
index c736ec1..14d64a6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ mccabe==0.6.1
 mistune==0.8.4
 nbconvert==5.6.1
 nbformat==5.0.7
-notebook==6.0.3
+notebook==6.4.1
 numpy==1.17.3
 packaging==20.4
 pandocfilters==1.4.2