diff --git a/requirements.txt b/requirements.txt
index b1eaf2d..d934423 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 rasa-core==0.13.1
 rasa-nlu==0.14.1
 sklearn-crfsuite==0.3.6
-nltk==3.3
+nltk==3.4.5
 flake8==3.7.7
\ No newline at end of file