diff --git a/docker/requirements.txt b/docker/requirements.txt
index 2848d92..e5acfcd 100644
--- a/docker/requirements.txt
+++ b/docker/requirements.txt
@@ -10,7 +10,7 @@ idna==2.10
 importlib-metadata==3.3.0
 joblib==1.0.0
 mccabe==0.6.1
-nltk==3.5
+nltk==3.6.5
 numpy==1.19.4
 packaging==20.8
 pandas==1.1.5