diff --git a/requirements.txt b/requirements.txt
index 8d62a4a..f3f92df 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,4 @@
 PyDictionary==1.5.2
 wikipedia==1.4.0
 spacy==2.1.0
-nltk==3.4.5
\ No newline at end of file
+nltk==3.9
\ No newline at end of file