diff --git a/news_navigator_app/requirements.txt b/news_navigator_app/requirements.txt
index 64540d5..72fdf96 100644
--- a/news_navigator_app/requirements.txt
+++ b/news_navigator_app/requirements.txt
@@ -2,6 +2,6 @@ Flask==1.1.2
 flask-paginate==0.6.0
 Flask-WTF==0.14.3
 Jinja2==2.11.3
-nltk==3.4.4
+nltk==3.6.6
 redis
 requests==2.22.0