diff --git a/pyproject.toml b/pyproject.toml
index b3c6163c2..cddc79d8c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,7 +57,7 @@ dependencies = [
 	"cryptography",
 	"pytz",
 	"requests",
-	"lxml==4.9.4",  # FIXME: issue with version 5+
+	"lxml[html_clean]",
 	"chardet",
 	"ovh",
 	"oath",
diff --git a/requirements.txt b/requirements.txt
index 5056f2e67..a6c1ff357 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -109,7 +109,7 @@ jsonschema-specifications==2024.10.1
     # via jsonschema
 jwcrypto==1.5.6
     # via django-oauth-toolkit
-lxml==4.9.4
+lxml[html-clean,html_clean]==4.9.4
     # via modoboa (pyproject.toml)
 oath==1.4.4
     # via modoboa (pyproject.toml)