diff --git a/src/dto/chat.rs b/src/dto/chat.rs
new file mode 100644
index 0000000..b99987d
--- /dev/null
+++ b/src/dto/chat.rs
@@ -0,0 +1,6 @@
+use serde::{Serialize, Deserialize};
+
+#[derive(Serialize, Deserialize, Debug, Default, PartialEq, Eq, PartialOrd, Ord)]
+pub struct ChatRoomParticipants {
+    pub participants: u32,
+}
\ No newline at end of file
diff --git a/src/dto/mod.rs b/src/dto/mod.rs
new file mode 100644
index 0000000..78ba7fb
--- /dev/null
+++ b/src/dto/mod.rs
@@ -0,0 +1 @@
+pub mod chat;
\ No newline at end of file