diff --git a/requirements.txt b/requirements.txt
index 9d64aa5..f0608a3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ mkdocs==1.4.0
 mkdocs-material==8.5.6
 mkdocs-material-extensions==1.0.3
 mkdocs-minify-plugin==0.5.0
-nltk==3.7
+nltk==3.9.4
 packaging==21.3
 Pygments==2.13.0
 pylinkvalidator==0.3