diff --git a/requirements.txt b/requirements.txt
index b70920f..0aa0ef0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,4 +5,4 @@ configparser==4.0.2
 textstat==0.5.7
 py-readability-metrics==1.4.5
 isbnlib==3.10.7
-nltk==3.7
+nltk==3.9