diff --git a/group_vars/instance_system/vars.yaml b/group_vars/instance_system/vars.yaml
index b58d9a2..fe9efcd 100644
--- a/group_vars/instance_system/vars.yaml
+++ b/group_vars/instance_system/vars.yaml
@@ -2,6 +2,7 @@
 
 timezone: Europe/Berlin
 domain: pichi.berlin
+protocol: http://
 
 stack_paperless_ocr_language: deu+eng
 stack_paperless_ocr_languages: eng deu frk