diff --git a/lyric-classifier/requirements.txt b/lyric-classifier/requirements.txt
index 318d091..5e23aac 100644
--- a/lyric-classifier/requirements.txt
+++ b/lyric-classifier/requirements.txt
@@ -3,7 +3,7 @@ numpy==1.13.3
 scikit-learn==0.19.1
 pandas==0.24.2
 matplotlib==2.2.2
-nltk==3.3
+nltk==3.4.5
 wordcloud==1.5.0
 Flask==0.12.3
 wtforms==2.1