diff --git a/nlp/requirements.txt b/nlp/requirements.txt
index 6456786..53508cd 100644
--- a/nlp/requirements.txt
+++ b/nlp/requirements.txt
@@ -1,3 +1,3 @@
 scikit-learn==0.19.1
 gensim==3.2.0
-nltk==3.2.5
+nltk==3.4.5