diff --git a/requirements.txt b/requirements.txt
index c7a1430..37e9aac 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ Jinja2==2.10
 kwconfig==1.1.7
 MarkupSafe==1.1.0
 more-itertools==4.3.0
-nltk==3.4
+nltk==3.4.5
 numpy==1.15.4
 pandas==0.23.4
 pkg-resources==0.0.0