diff --git a/requirements.txt b/requirements.txt
index d6f6436..a2d3982 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ matplotlib==2.0.2
 mysqlclient==1.3.12
 Naked==0.1.31
 nbformat==4.4.0
-nltk==3.2.5
+nltk==3.4.5
 numpy==1.11.0
 olefile==0.44
 opencv-python==3.3.0.10