diff --git a/requirements-dev.txt b/requirements-dev.txt
index 501347a..3c1f6a0 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -11,7 +11,7 @@ ecdsa==0.17.0
 Fabric==2.6.0
 factory-boy==3.2.0
 flake8==4.0.1
-lxml==4.6.3
+lxml==4.9.1
 nose==1.3.7
 paramiko==2.7.2
 path.py==12.5.0