diff --git a/pip-sample/requirements.txt b/pip-sample/requirements.txt
index 1d7c58ab9..bb044efd5 100644
--- a/pip-sample/requirements.txt
+++ b/pip-sample/requirements.txt
@@ -26,7 +26,7 @@ kiwisolver==1.0.1
 mistune==0.8.3
 nbconvert==5.4.0
 nbformat==4.4.0
-nltk==3.3
+nltk==3.9.4
 notebook==5.7.0
 oauthlib==2.1.0
 pandocfilters==1.4.2
@@ -43,7 +43,7 @@ PySocks==1.6.8
 python-dateutil==2.7.3
 pytz==2018.5
 qtconsole==4.4.1
-requests==2.19.1
+requests==2.33.0
 requests-oauthlib==1.0.0
 Send2Trash==1.5.0
 simplegeneric==0.8.1