diff --git a/demo-python/code/custom-vectorizer/api/functions/requirements.txt b/demo-python/code/custom-vectorizer/api/functions/requirements.txt
index 563c624..78250f9 100644
--- a/demo-python/code/custom-vectorizer/api/functions/requirements.txt
+++ b/demo-python/code/custom-vectorizer/api/functions/requirements.txt
@@ -17,7 +17,7 @@ joblib==1.3.2
 MarkupSafe==2.1.3
 mpmath==1.3.0
 networkx==3.2.1
-nltk==3.8.1
+nltk==3.10.0
 numpy==1.26.3
 packaging==23.2
 pillow==10.2.0