diff --git a/requirements.txt b/requirements.txt
index a86ad78..f3ace65 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ importlib-metadata==1.6.0
 itsdangerous==1.1.0
 Jinja2==2.11.2
 loguru==0.4.1
-lxml==4.5.0
+lxml==4.9.1
 MarkupSafe==1.1.1
 more-itertools==8.2.0
 numpy==1.18.3