diff --git a/requirements.txt b/requirements.txt
index cbded17..5b8e0dd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ idna==2.7
 idna-ssl==1.1.0
 itsdangerous==0.24
 Jinja2==2.10
-lxml==4.2.4
+lxml==4.9.1
 MarkupSafe==1.0
 marshmallow==3.0.0b13
 multidict==4.3.1