diff --git a/requirements.txt b/requirements.txt
index e68a442..0c0352b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -44,7 +44,7 @@ more-itertools==7.0.0
 moz-sql-parser==2.44.19084
 nbconvert==5.5.0
 nbformat==4.4.0
-nltk==3.4.1
+nltk==3.4.5
 notebook==5.7.8
 numpy==1.16.3
 pandas==0.24.2