diff --git a/requirements.txt b/requirements.txt
index f18fcbd..aca83e1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 numpy==1.22.0
-nltk==3.4.5
+nltk==3.9
 pandas==0.24.2
 inflect==4.1.0
 vaderSentiment==3.2.1
\ No newline at end of file