diff --git a/requirements.txt b/requirements.txt
index e04b82e..c1d277c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -44,7 +44,7 @@ more-itertools==7.2.0
 multidict==4.5.2
 nbconvert==5.6.0
 nbformat==4.4.0
-notebook==6.1.5
+notebook==6.4.12
 packaging==19.1
 pandocfilters==1.4.2
 parso==0.5.1