diff --git a/backend/requirements.txt b/backend/requirements.txt
index 16c864a9..a65da397 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -1,4 +1,4 @@
-nltk==3.5
+nltk==3.6.6
 python-dotenv
 google-cloud-vision
 Flask