diff --git a/requirements.txt b/requirements.txt
index 4398ec0..4c1d4e7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ Keras-Preprocessing==1.0.5
 kiwisolver==1.0.1
 Markdown==3.0.1
 matplotlib==3.0.2
-nltk==3.4
+nltk==3.4.5
 numpy==1.15.4
 parso==0.3.1
 pexpect==4.6.0