diff --git a/cs231n-2019/assignment3/requirements.txt b/cs231n-2019/assignment3/requirements.txt
index 8273b61..e8f034f 100644
--- a/cs231n-2019/assignment3/requirements.txt
+++ b/cs231n-2019/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==3.6.3
 notebook==4.0.6
 numexpr==2.6.5
 numpy==1.13.3