diff --git a/requirements.txt b/requirements.txt
index 3cb91c6..3d78523 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ idna==2.8
 itsdangerous==1.1.0
 Jinja2==2.10
 MarkupSafe==1.1.0
-nltk==3.4
+nltk==3.4.5
 numpy==1.16.0
 oauthlib==3.0.1
 packaging==19.0