diff --git a/weekFour/requirements.txt b/weekFour/requirements.txt
index 7b4fa53..10053e6 100644
--- a/weekFour/requirements.txt
+++ b/weekFour/requirements.txt
@@ -24,7 +24,7 @@ mistune==0.8.4
 more-itertools==7.0.0
 nbconvert==5.5.0
 nbformat==4.4.0
-notebook==5.7.8
+notebook==6.4.12
 numpy==1.16.4
 packaging==19.0
 pandas==0.24.2