diff --git a/plinth/modules/sso/__init__.py b/plinth/modules/sso/__init__.py
index 2fbb872d5..48e70b448 100644
--- a/plinth/modules/sso/__init__.py
+++ b/plinth/modules/sso/__init__.py
@@ -25,7 +25,7 @@ version = 1
 
 is_essential = True
 
-depends = ['security']
+depends = ['security', 'apache']
 
 name = _('Single Sign On')