diff --git a/requirements.txt b/requirements.txt
index 6e3fd63..c0d356b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ django-templated-email==3.0.0
 django==3.2.8
 idna==3.3; python_version >= '3'
 isodate==0.6.0
-lxml==4.6.3; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
+lxml==4.9.1; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
 mysqlclient==2.0.3
 oauthlib==3.1.1; python_version >= '3.6'
 platformdirs==2.4.0; python_version >= '3.6'