diff --git a/requirements.txt b/requirements.txt
index 882697b..f46e9e3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ incremental==17.5.0
 itsdangerous==1.1.0
 jdcal==1.4.1
 Jinja2==2.10.1
-lxml==4.3.3
+lxml==4.6.3
 MarkupSafe==1.1.1
 numpy==1.16.3
 openpyxl==2.6.2