diff --git a/server/requirements.txt b/server/requirements.txt
index 76126f7..2351d10 100644
--- a/server/requirements.txt
+++ b/server/requirements.txt
@@ -82,7 +82,7 @@ lazy-object-proxy==1.2.2
 llvmlite==0.18.0
 locket==0.2.0
 lockfile==0.12.2
-lxml==3.7.3
+lxml==4.6.2
 MarkupSafe==0.23
 matplotlib==2.0.2
 menuinst==1.4.7