diff --git a/requirements.txt b/requirements.txt
index 4ac3323..508b463 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ isort==4.2.15
 lazy-object-proxy==1.3.1
 mccabe==0.6.1
 multidict==3.0.0
-nltk==3.2.4
+nltk==3.4.5
 oauthlib==2.0.2
 packaging==16.8
 pep8==1.7.0