diff --git a/requirements.txt b/requirements.txt
index 397ed08..b9f3091 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 bottle==0.12.17
-nltk==3.4.5
+nltk==3.6.6
 numpy==1.17.3
 pandas==0.25.2
 python-dotenv==0.10.3