diff --git a/requirements.txt b/requirements.txt
index 58ff74f..f701b8d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 Django==2.2.9
-lxml==4.4.2
+lxml==4.9.1
 pika==1.1.0
 spyne==2.13.12b0
 celery==4.4.0
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 44ac21a..4ca15fa 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -14,7 +14,7 @@ importlib-metadata==1.4.0
 jeepney==0.4.2
 keyring==21.1.0
 kombu==4.6.7
-lxml==4.4.2
+lxml==4.9.1
 more-itertools==8.1.0
 packaging==20.0
 pika==1.1.0
diff --git a/setup.cfg b/setup.cfg
index 2c32985..241725e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -46,7 +46,7 @@ include_package_data = true
 packages = find:
 install_requires =
   Django>=2.0
-  lxml==4.4.2
+  lxml==4.9.1
   spyne==2.13.12b0
 
 [options.extras_require]