diff --git a/tox.ini b/tox.ini
index 365766e..4d62ec5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -83,6 +83,7 @@ commands =
 [testenv:loader-yourdfpy]
 changedir = {toxinidir}/tests/loaders
 deps =
+    lxml <=4.9.4
     numpy >=1.23.4
     trimesh ~=3.16.0
     yourdfpy >=0.0.53