diff --git a/requirements.txt b/requirements.txt
index a261633..468c146 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 # Automatically generated by https://github.com/damnever/pigar.
 
 matplotlib == 3.2.2
-nltk == 3.8.1
+nltk == 3.9
 pandas == 1.0.5
 pandas_datareader == 0.9.0
 tweepy == 3.10.0