diff --git a/Twitter-Sentiment-Classifier/requirements.txt b/Twitter-Sentiment-Classifier/requirements.txt
index b4fa54f..15578c0 100644
--- a/Twitter-Sentiment-Classifier/requirements.txt
+++ b/Twitter-Sentiment-Classifier/requirements.txt
@@ -1,4 +1,4 @@
-nltk==3.2.1
+nltk==3.4.5
 scipy==0.17.1
 scikit_learn==0.17.1
 numpy==1.8.0