diff --git a/pip-sample/requirements.txt b/pip-sample/requirements.txt
index 680d08166..17526c79d 100644
--- a/pip-sample/requirements.txt
+++ b/pip-sample/requirements.txt
@@ -17,7 +17,7 @@ ipython-genutils==0.2.0
 ipywidgets==7.4.2
 itsdangerous==1.1.0
 jedi==0.12.1
-Jinja2==2.10
+Jinja2==2.11.3
 jsonschema==2.6.0
 jupyter==1.0.0
 jupyter-client==5.2.3
@@ -41,7 +41,7 @@ prometheus-client==0.3.1
 protobuf==3.6.1
 protobuf-to-dict==0.1.0
 ptyprocess==0.6.0
-Pygments==2.2.0
+Pygments==2.7.4
 pyparsing==2.2.0
 PySocks==1.6.8
 python-dateutil==2.7.3
@@ -62,6 +62,6 @@ urllib3==1.23
 virtualenv==16.0.0
 wcwidth==0.1.7
 webencodings==0.5.1
-Werkzeug==0.14.1
+Werkzeug==0.15.3
 widgetsnbextension==3.4.2
 xlrd==1.1.0