diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index cb81d6d..b58bf72
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
 Flask==1.1.1
-nltk==3.4.5
\ No newline at end of file
+nltk==3.6.5
\ No newline at end of file