diff --git a/requirements.txt b/requirements.txt
index 561f390..aab75b6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -98,7 +98,7 @@ kiwisolver==1.1.0
 lazy-object-proxy==1.4.3
 lightgbm==2.3.1
 lockfile==0.12.2
-lxml==4.5.0
+lxml==4.6.5
 Mako==1.1.2
 Markdown==2.6.11
 MarkupSafe==1.1.1