diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index ce427b7..a46d818
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
-nltk==3.4.5
+nltk==3.6.6
 transformers==4.15.0
 lxml