diff --git a/requirements.txt b/requirements.txt
index 9ec12d424..abf49d47a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,7 +27,7 @@ python-dateutil
 cryptography
 pytz
 requests
-lxml
+lxml==4.9.4  # FIXME: issue with version 5+
 chardet
 ovh
 oath