diff --git a/requirements.txt b/requirements.txt
index acc7de0..29e0019 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ jmespath==0.9.4
 MarkupSafe==1.1.1
 murmurhash==1.0.2
 mysql-connector==2.2.9
-nltk==3.4.5
+nltk==3.6.6
 numpy==1.22.0
 pandas==0.25.2
 plac==0.9.6