diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 85cce76b..65445fad
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ gdata==2.0.18
 gevent==1.0.2
 greenlet==0.4.7
 jcconv==0.2.3
-lxml==3.3.5
+lxml==4.9.1
 mock==1.0.1
 passlib==1.6.2
 psutil==2.1.1