diff --git a/requirements.txt b/requirements.txt
index f1ca512..3ccae39 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -51,7 +51,7 @@ monkeylearn==3.4.0
 murmurhash==1.0.2
 nbconvert==5.5.0
 nbformat==4.4.0
-nltk==3.4.3
+nltk==3.4.5
 notebook==5.7.8
 numpy==1.16.4
 pandas==0.24.2