diff --git a/pip-sample/requirements.txt b/pip-sample/requirements.txt
index 680d0816..f6409793 100644
--- a/pip-sample/requirements.txt
+++ b/pip-sample/requirements.txt
@@ -1,4 +1,4 @@
-bleach==2.1.4
+bleach==3.3.0
 certifi==2018.8.24
 chardet==3.0.4
 Click==7.0
@@ -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
@@ -25,12 +25,12 @@ jupyter-core==4.4.0
 kiwisolver==1.0.1
 MarkupSafe==1.0
 matplotlib==2.2.2
-mistune==0.8.3
-nbconvert==5.4.0
+mistune==2.0.3
+nbconvert==6.3.0b0
 nbformat==4.4.0
-nltk==3.3
-notebook==5.7.0
-numpy==1.15.3
+nltk==3.6.6
+notebook==6.4.12
+numpy==1.22.2
 oauthlib==2.1.0
 pandas==0.23.3
 pandocfilters==1.4.2
@@ -41,14 +41,14 @@ 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
 pytz==2018.5
 pyzmq==17.1.2
 qtconsole==4.4.1
-requests==2.19.1
+requests==2.20
 requests-oauthlib==1.0.0
 Send2Trash==1.5.0
 simplegeneric==0.8.1
@@ -58,10 +58,10 @@ testpath==0.4.1
 tornado==5.1.1
 traitlets==4.3.2
 tweepy==3.6.0
-urllib3==1.23
+urllib3==1.26.5
 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