diff --git a/requirements.txt b/requirements.txt
index 52332a1f..76346063 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -64,7 +64,7 @@ lxml==3.3.0
 mock==1.0.1
 newrelic==2.18.1.15
 newspaper==0.0.6
-nltk==3.0.4
+nltk==3.4.5
 nose==1.3.0
 numpy==1.11.1
 paramiko==1.12.4