diff --git a/main/requirements.txt b/main/requirements.txt
index 0102a2f..0f5b64e 100644
--- a/main/requirements.txt
+++ b/main/requirements.txt
@@ -12,4 +12,4 @@ howdoi
 html2text==2018.1.9
 scikit-learn==0.20.2
 pandas==0.23.0
-nltk==3.4.5
+nltk==3.9