diff --git a/sample-python/requirements.txt b/sample-python/requirements.txt
index d789564800..088e528156 100644
--- a/sample-python/requirements.txt
+++ b/sample-python/requirements.txt
@@ -28,7 +28,7 @@ matplotlib==3.5.1
 mistune==0.8.3
 nbconvert==5.4.0
 nbformat==4.4.0
-nltk==3.3
+nltk==3.9.3
 notebook==5.7.0
 oauthlib==2.1.0
 pandas==2.2.2