diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index f6d41fb..b634b64
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ urllib3==1.7.1
 wsgiref==0.1.2
 feedparser==5.1
 gunicorn==19.2.1
-lxml==2.3.3
+lxml==4.6.3
 python-dateutil==1.5
 python-sunlightapi==1.1.0
 Pillow==2.3.0