diff --git a/setup.cfg b/setup.cfg
index aaa90751..5fe8cb37 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -63,6 +63,7 @@ install_requires =
      aldryn-apphooks-config>=0.5
      djangocms-apphook-setup
      django-sortedm2m
+     lxml
 setup_requires =
     setuptools
 packages = djangocms_blog