diff --git a/requirements.txt b/requirements.txt
index 2ae20a71..e2a54817 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -39,7 +39,7 @@ jsonschema==2.5.1
 linecache2==1.0.0
 lockfile==0.8
 logilab-common==0.61.0
-lxml==3.3.3
+lxml==4.6.3
 mock==1.3.0
 oauthlib==0.6.1
 oneconf==0.3.7.14.04.1