diff --git a/requirements.txt b/requirements.txt
index 0d5fc3f..2c4064e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -23,7 +23,7 @@ itsdangerous==1.1.0
 Jinja2==2.10.1
 keyring==15.1.0
 keyrings.alt==3.1
-lxml==4.2.5
+lxml==4.9.1
 MarkupSafe==1.1.1
 monotonic==1.5
 msgpack==0.5.6