diff --git a/tox.ini b/tox.ini
index 22b1de742..1344d3ee9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,7 +16,7 @@ deps =
     pytest
     pytest-randomly
     -rrequirements.txt
-    !nolxml: lxml==4.6.4
+    !nolxml: lxml==4.9.1
 extras =
     ufo
     woff