diff --git a/requirements_py2.txt b/requirements_py2.txt
index f784faa..a695b1c 100644
--- a/requirements_py2.txt
+++ b/requirements_py2.txt
@@ -1,5 +1,5 @@
 click>=6.3
-nltk==3.6.6
+nltk==3.9
 numpy>=1.11.0<=1.17
 psutil>=5.6.2
 requests>=2.19