diff --git a/requirements.txt b/requirements.txt
index c453275..acdd4ee 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 alpha-vantage==2.1.0
 fbprophet==0.5
 gensim==3.7.3
-nltk==3.4.1
+nltk==3.4.5
 pandas==0.24.2
 tweepy==3.7.0
 Flask==1.0.3