diff --git a/requirements.txt b/requirements.txt
index 8f57ccd..41a83b1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 certifi==2018.10.15
 chardet==3.0.4
 idna==2.7
-nltk==3.3
+nltk==3.4.5
 numpy==1.15.4
 oauthlib==2.1.0
 pandas==0.23.4