diff --git a/SOURCES/requirements.txt b/SOURCES/requirements.txt
index f11f8c8..c0e2b40 100644
--- a/SOURCES/requirements.txt
+++ b/SOURCES/requirements.txt
@@ -50,7 +50,7 @@ gsconfig==1.0.3
 gsimporter==1.0.0
 httplib2==0.9.2
 kombu==3.0.33
-lxml==3.5.0
+lxml==4.9.1
 MapProxy==1.8.0
 mccabe==0.4.0
 meld3==1.0.2