diff --git a/requirements.txt b/requirements.txt
index 6463a80..1f440da 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,7 @@ keras-transformer==0.17.0
 kiwisolver==1.0.1
 Markdown==3.0.1
 matplotlib==3.0.2
-nltk==3.4
+nltk==3.4.5
 numpy==1.16.1
 pandas==0.24.0
 Pillow==5.4.1