diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index db05661..0264c90
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,7 +32,7 @@ Jinja2==2.10
 jmespath==0.9.0
 keyring==10.1
 keyrings.alt==1.3
-lxml==3.7.1
+lxml==4.9.1
 MarkupSafe==1.0
 mercurial==4.0
 mock==2.0.0