diff --git a/src/dto/chat.rs b/src/dto/chat.rs
index b99987d..65e291e 100644
--- a/src/dto/chat.rs
+++ b/src/dto/chat.rs
@@ -2,5 +2,5 @@ use serde::{Serialize, Deserialize};
 
 #[derive(Serialize, Deserialize, Debug, Default, PartialEq, Eq, PartialOrd, Ord)]
 pub struct ChatRoomParticipants {
-    pub participants: u32,
+    pub participants: Vec<u32>,
 }
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