diff --git a/discs/requirements.txt b/discs/requirements.txt
index aa5d83d..cf94ec4 100644
--- a/discs/requirements.txt
+++ b/discs/requirements.txt
@@ -15,5 +15,5 @@ optax==0.1.4
 networkx==2.6.3
 python-sat==0.1.7.dev23
 tensorboard==2.11.0
-nltk==3.8.1
+nltk==3.9
 pickle5