diff --git a/requirements-dev.txt b/requirements-dev.txt
index 655be0616d1d..f320014db170 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -13,5 +13,5 @@ six>=1.9
 prompt-toolkit==1.0.14
 click==6.7
 inflection==0.3.1
-lxml==4.0.0
+lxml==4.9.1
 beautifulsoup4==4.6.0