diff --git a/ibm-aggregator/requirements.txt b/ibm-aggregator/requirements.txt
index c945c48..906d89b 100644
--- a/ibm-aggregator/requirements.txt
+++ b/ibm-aggregator/requirements.txt
@@ -46,7 +46,7 @@ mpld3==0.3
 nbconvert==5.3.1
 nbformat==4.4.0
 nltk==3.3
-notebook==5.5.0
+notebook==6.4.12
 numexpr==2.6.5
 numpy==1.14.3
 oauthlib==2.1.0