diff --git a/assignment3/requirements.txt b/assignment3/requirements.txt
index 1ccede9..7ba3ec4 100644
--- a/assignment3/requirements.txt
+++ b/assignment3/requirements.txt
@@ -38,7 +38,7 @@ mistune==0.7.1
 multidict==4.3.1
 nbconvert==4.1.0
 nbformat==4.0.1
-nltk==3.2.2
+nltk==3.4.5
 notebook==4.0.6
 numexpr
 numpy