diff --git a/requirements.txt b/requirements.txt
index 979f7a9..fd71c64 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-nltk==3.4.5
+nltk==3.9
 PySide2==5.15.2
 beautifulsoup4==4.5.3
 regex==2017.02.08
\ No newline at end of file