diff --git a/requirements.txt b/requirements.txt
index 964b233..6e57934 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 numpy>=1.22
-nltk==3.9
+nltk==3.9.3
 torch==2.2.0
 tensorboardX==2.0