diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index beee86c..ec84fea
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,4 @@ beautifulsoup4==4.4.1
 PyYAML==3.11
 requests==2.12.4
 wheel==0.24.0
-lxml==3.8.0
+lxml==4.9.1