diff --git a/pip-sample/requirements.txt b/pip-sample/requirements.txt
index 680d08166..bdaf2a06f 100644
--- a/pip-sample/requirements.txt
+++ b/pip-sample/requirements.txt
@@ -29,7 +29,7 @@ mistune==0.8.3
 nbconvert==5.4.0
 nbformat==4.4.0
 nltk==3.3
-notebook==5.7.0
+notebook==6.4.12
 numpy==1.15.3
 oauthlib==2.1.0
 pandas==0.23.3