diff --git a/code/requirements/base.txt b/code/requirements/base.txt
index cd5e4217..2eecfefa 100644
--- a/code/requirements/base.txt
+++ b/code/requirements/base.txt
@@ -52,7 +52,7 @@ jsonfield==3.1.0
 Khayyam==3.0.17
 kiwisolver==1.1.0
 kombu==4.6.7
-lxml==4.5.0
+lxml==4.9.1
 MarkupSafe==1.1.1
 matplotlib==3.0.3
 numpy==1.17.4