diff --git a/requirements.txt b/requirements.txt
index 7bc464e..823b51a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ greenlet==0.4.12
 idna==2.6
 imagesize==0.7.1
 Jinja2==2.9.6
-lxml==3.8.0
+lxml==4.9.1
 MarkupSafe==1.0
 Pygments==2.2.0
 python-ultimate-guitar==0.1.0