diff --git a/requirements.txt b/requirements.txt
index 16a45fc..a5506a8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ metakernel==0.13.1
 mistune==0.7.3
 nbconvert==4.2.0
 nbformat==4.0.1
-notebook==4.2.1
+notebook==6.4.12
 pickleshare==0.7.2
 Pygments==2.1.3
 pyreadline==2.1