diff --git a/ansible/roles/stack-sunbird/templates/sunbird_player.env b/ansible/roles/stack-sunbird/templates/sunbird_player.env
index 23db6802fc..c6d6d9be38 100644
--- a/ansible/roles/stack-sunbird/templates/sunbird_player.env
+++ b/ansible/roles/stack-sunbird/templates/sunbird_player.env
@@ -131,3 +131,6 @@ dock_program_service_url={{ dock_program_service_url }}
 
 #Release-3.9.0
 dock_questionSet_enable={{ dock_questionSet_enable | default('true') }}
+
+#release-4.0.0
+sunbird_base_proto={{sunbird_base_proto | default(proto)}}