diff --git a/requirements.txt b/requirements.txt
index 106c82f63e..f9160e0b88 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ joblib>=1.1.1
 kiwisolver==1.4.4
 matplotlib==3.7.2
 multidict==6.0.4
-nltk==3.6.5
+nltk==3.9.3
 numpy==1.25.2
 openai==0.27.0
 outcome==1.2.0