diff --git a/requirements/requirements.txt b/requirements/requirements.txt
index 2598118..876e574 100644
--- a/requirements/requirements.txt
+++ b/requirements/requirements.txt
@@ -114,7 +114,7 @@ lazy-object-proxy==1.3.1
 lesscpy==0.13.0
 llvmlite==0.20.0
 locket==0.2.0
-lxml==4.2.1
+lxml==4.9.1
 Markdown==2.6.11
 MarkupSafe==1.0
 matplotlib==2.2.2