diff --git a/serving/client_requirements.txt b/serving/client_requirements.txt
index 608f2d8..9e9a474 100644
--- a/serving/client_requirements.txt
+++ b/serving/client_requirements.txt
@@ -39,7 +39,7 @@ mistune==0.8.3
 mock==2.0.0
 nbconvert==5.3.1
 nbformat==4.4.0
-notebook==5.5.0
+notebook==6.1.5
 numpy==1.14.3
 pandocfilters==1.4.2
 parso==0.2.1