diff --git a/backend/docker/requirements.txt b/backend/docker/requirements.txt
index 143eb10e..1477ba62 100644
--- a/backend/docker/requirements.txt
+++ b/backend/docker/requirements.txt
@@ -150,7 +150,7 @@ mccabe==0.6.1
     # via flake8
 mypy-extensions==0.4.3
     # via black
-nltk==3.6.5
+nltk==3.8.1
     # via sentence-transformers
 nodeenv==1.6.0
     # via pre-commit