diff --git a/spam/requirements.txt b/spam/requirements.txt
index 79f7c65..0c05df2 100644
--- a/spam/requirements.txt
+++ b/spam/requirements.txt
@@ -1,6 +1,6 @@
 matplotlib==3.5.3
 names==0.3.0
-nltk==3.4.5
+nltk==3.9.3
 numpy>=1.16.5
 pandas>=1.0.0
 scikit-learn>=0.20.2