diff --git a/requirements.txt b/requirements.txt
index e5fa521..a5a784f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -115,7 +115,7 @@ nbformat==5.7.3
 nest-asyncio==1.5.6
 networkx==3.3
 ninja==1.11.1.1
-nltk==3.8.1
+nltk==3.9
 notebook==6.5.2
 notebook_shim==0.2.2
 numba==0.56.4