diff --git a/requirements.txt b/requirements.txt
index 554752b..85a9287 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 Flask==1.0.2
 numpy==1.16.2
 SQLAlchemy==1.3.1
-nltk==3.4
+nltk==3.4.5
 scipy==1.2.1
 plotly==4.1.1
 pandas==0.24.2