diff --git a/requirements.txt b/requirements.txt
index 7a4cc96..2ca1ff9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ itsdangerous==0.24
 Jinja2==2.9.6
 MarkupSafe==1.0
 matplotlib==2.0.2
-nltk==3.2.2
+nltk==3.4.5
 numpy==1.12.1
 oauth2client==4.1.0
 powerline-status==2.6