diff --git a/priv/graphql/schemas/global/muc_light.gql b/priv/graphql/schemas/global/muc_light.gql
index cdac57ba84..a89fe1f539 100644
--- a/priv/graphql/schemas/global/muc_light.gql
+++ b/priv/graphql/schemas/global/muc_light.gql
@@ -45,7 +45,7 @@ type Room{
   name: String!
   subject: String!
   participants: [RoomUser!]!
-  options: [RoomConfigDictEntry]
+  options: [RoomConfigDictEntry!]!
 }
 
 type RoomUser{